Parenting a newborn or infant can be stressful, tiring, and downright terrifying. You want to get everything right, and in those early days that often means finding the safest infant car seat and perfecting their feedings and sleep schedules so that the little ones grow and thrive. A baby formula maker that makes accurate, warm, ready-to-drink bottles will take some of that work off your plate. A big selling point is that it’s a tech-savvy solution that’s presumably more accurate than relying on your hands and tired eyes.
But dozens of complaints from caregivers and medical experts to the Consumer Product Safety Commission (CPSC) about the most popular baby formula maker and machine on the market—the Baby Brezza Formula Pro Advanced—prompted CR’s safety experts to investigate the accuracy of these machines. At the heart of all of these reports is a similar theme: Baby formula makers may be far less useful than a high-tech $200 gadget has any right to be—and in some cases, they also may be ineffective.
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One complaint logged with the CPSC described an incident where an infant was admitted to a hospital with “severe malnutrition” and being “underweight,” and noted the family was using the Baby Brezza Formula Pro. (Note: While the American Academy of Pediatrics previously used the phrase “failure to thrive,” it now prefers the term “malnutrition,” a more precise diagnostic term.) Baby Brezza responded to the complaint with a statement that read, in part: “We know from over eight years of selling the Formula Pro worldwide that the proper set-up and operation of the Formula Pro is essential to its proper operation, including accurate dispensing. We don’t know if this user followed our detailed instructions to ensure its proper set-up and use. This includes choosing the right formula setting for the formula brand/type that a user is using, cleaning the funnel after every 4 bottles and wiping the underside of the powder container after every 4 bottles.”
The baby formula maker market in the U.S. is very small, with Baby Brezza dominating the landscape with its most popular model, the Formula Pro Advanced. As of January 2024, it has received 8,664 reviews on Amazon and has a rating of 4.5 out of 5 stars. But more than 650 of those are 1-star reviews that cite issues including inaccurate dispensing. And since 2016, this model has been linked to 35 reported incidents in the federal government’s saferproducts.gov consumer complaint database. These include reports of infant hospitalizations and emergency department treatment. The reports repeatedly mention concerns about the formula not mixing properly, the inaccuracy of the amount of powder formula dispensed, and babies not gaining weight appropriately.
Baby Brezza Enterprises has also defended the Formula Pro Advanced formula maker against complaints on saferproducts.gov with statements such as: “When set up, maintained and cleaned properly, Formula Pro mixes and dispenses formula appropriately and accurately. We stand behind our product and would welcome the opportunity to speak to this customer directly to understand what she is experiencing with her machine.” When addressing another CPSC complaint that Baby Brezza’s formula maker incorrectly mixed formula and resulted in their baby’s “failure to thrive” and “multiple medical appointments,” Baby Brezza responded with a statement that read, in part: “We fully stand behind our product and its accuracy. Based on our years of experience selling the Formula Pro, we’ve found that most issues are resolved with the proper assembly, cleaning and formula setting for the formula used. We also offer a 1 year limited warranty which includes either a replacement or a refund when appropriate.”
CR reached out to Baby Brezza with a question about the complaints and the company responded with a statement that read: “[ . . . ] these complaints are not indicative of the overall experience of Formula Pro Advanced users. A much better indicator are reviews posted on Amazon or various retailers in which many thousands of users have given the Formula Pro Advanced 4.5 star ratings or above with the vast majority of reviews being 4 and 5 stars.” According to Baby Brezza, “many of these users didn’t follow the simple set-up and usage instructions like looking up the setting for their brand/type of formula on BabyBrezza.com, cleaning the funnel after every 4 bottles, and keeping the formula powder above the min line. If these steps aren’t followed, the machine may not dispense accurately.” The company also says it spoke with several pediatricians who filed complaints on behalf of their patients and found “none were aware of how the parents of these patients used the machine and whether all of the set-up and usage instructions were followed.” The CPSC responded to our questions about the complaints on saferproducts.gov by saying, “We cannot comment on possible enforcement matters related to particular companies.”
To assess the accuracy of leading formula makers, we performed two assessments of Baby Brezza Formula Pro Advanced and two additional leading baby formula makers—the Baby Brezza Formula Pro Advanced WiFi, a newer, more expensive $300 model with Wi-Fi capabilities, and the Baby Exo Formula Dispenser Machine. We attempted to order a fourth model called the LivingEZ Smart Formula Mixer, but Walmart canceled our order due to shipping delays, and we were unable to reorder it in time for the assessment. Our goal was to see whether the machines consistently dispensed accurate powder-to-water ratios as per that brand’s specifications and whether temperatures were consistent and safe for babies.
How Do Baby Formula Makers Work?
Although all three baby formula makers we assessed are designed in similar ways, they each have notable differences.
The Basics of Each Machine
All of the machines come with a water tank on the back; a powder container at the top that you fill with powdered formula; a funnel and funnel cover with two holes through which water and powder are dispensed separately before meeting and mixing in the funnel; and an adjustable drip tray where you place your bottle. Both Baby Brezza formula machines instruct users to fill their powder containers with powdered baby formula between the minimum and maximum lines indicated on the outside of the container. The manual for each advises refilling powder containers when the arms of the stirring wheels become visible because “this is very important for accurate formula measuring.”
We used Similac Advance Infant Formula for both Baby Brezza models, as well as the Baby Exo formula maker because a CR market analyst determined that Similac and Enfamil were top-selling brands. We had to add 13 scoops of Similac Advance Infant Formula with Iron, or the equivalent of 13 2-ounce bottles, to meet this requirement. Baby Exo’s powder container also features minimum and maximum lines, but its user manual instructs people to “pour milk powder into the powder box (300G recommended, no more than 400G), and close the powder cover.” The manual goes on to say that a bottle may be short in milk powder if “the powder box is short of formula powder.” But it doesn’t mention covering its stirring wheel with formula powder or keeping formula powder between the minimum/maximum lines on its powder container.
Each water tank needs to be filled with a minimum amount of water. The Baby Brezza models and Baby Exo will flash warning symbols on their control panels if the water in their tanks is low.
Photo: Consumer Reports Photo: Consumer Reports
Choosing the Formula Settings
Baby Brezza models: The LCDs on all three models allow you to set the temperature, the number of ounces you want to make, and your formula settings. Let’s focus for a moment on that last point, because it’s crucial and also proved problematic. Both Baby Brezza models have specific formula settings that correspond to different formula brands and variations. Both manuals instruct you to go to babybrezza.com/FPA to find your formula setting by adding your email address (so the company can contact you when settings change). You also need to indicate the country where you purchased the formula, your formula brand, and your type and stage. An alternate way to find your setting is to scan your formula’s bar code by accessing this website via your smartphone.
When we went to the Baby Brezza site to find our setting for both the Baby Brezza Formula Pro Advanced and Baby Brezza Formula Pro Advanced WiFi, Similac Advance wasn’t an option in the drop-down menu, but Similac’s formula types included one called Advance Lamehadrin Infant Formula.
Source: Baby Brezza Source: Baby Brezza
We called Baby Brezza’s customer service number to explain the issue and were asked to read the numbers near the bar code on the formula can, after which we were told our formula option should be OptiGRO, which is formula setting number 4. Although the formula container features OptiGRO in smaller type beneath the main product name, we would not be surprised if more people looked past this and chose instead the wrong formula setting for Similac Advance Lamehadrin Infant Formula because it’s the only option with Similac Advance in its name.
Baby Exo: This model doesn’t offer settings for specific formula brands and types. Instead, the manual instructs you to check the formula information on the package. If, for example, the package shows you need to mix 8.7 grams of powder with 2 fluid ounces of water (as it does for Similac Advance), you divide 8.7 by 2 to get 4.35 grams of powder for 1 fluid ounce and set the formula setting value to 4.4 or 4.3 grams. (According to Baby Exo, you needn’t worry about the 0.05 gram deviation because “it will not effect [sic] your baby’s health,” as the brand claims.) The machine then remembers this formula setting and you shouldn’t have to reset it in the future.
We consulted Mark R. Corkins, a pediatric gastroenterologist, professor of pediatrics at the University of Tennessee Health Science Center, and chair of the Committee on Nutrition at the American Academy of Pediatrics (AAP). He said that while 0.05 gram is a very small amount and minor inaccuracies here and there are “probably okay,” once you’re getting above 5 percent more or 5 percent less than the recommended amount of formula powder per volume of water, you’re probably going to start seeing effects on growth. Corkins says that 5 percent is a rule used by many experts in the nutrition field, and that mathematically speaking, for 4.4 grams of powdered formula (the approximate amount of formula recommended by Similac Advance Infant Formula for 1 fluid ounce of water), 5 percent is 0.22 gram more or less.
Jennifer Shu, a pediatrician at Children’s Medical Group and the editor of the AAP parenting website HealthyChildren.org, offered a different perspective. She said she wasn’t sure a simple 5 percent rule was always accurate, and that the “safe” variation percentage could vary based on a child’s age, weight, and duration of time the variation occurs. For example, Shu said, a newborn has a smaller margin of error than a 6-month-old baby, and a one-time small variation is less concerning than a large or long-lasting variation. “I have had a couple of patients who reported inaccurate measurements using the Baby Brezza, which led to poor growth, irritability, and diarrhea,” Shu said. “Although complications from inaccurate dispensing of water/formula by machines may not be common, it is important for parents to be aware of the possibility of problems and to let their pediatrician know how they are preparing infant formula.”
Photo: Consumer Reports Photo: Consumer Reports
Choosing Temperature Settings
You can set each baby formula maker to different temperatures. The two Baby Brezza models offer three temperature ranges, but instead of specifying exact temperatures, their manuals label them “room temperature,” “body temperature,” and “slightly warmer than body temperature.” (Baby Brezza told CR that the machine is set to dispense body temperature formula at 98.6° F to 100° F and that it allows a slight tolerance above 98.6° F because “water loses some heat when it’s dispensed into the mixing funnel, then mixes with formula and is dispensed into the bottle.”) The Baby Exo is more specific. Its default temperature setting is 113° F, and the manual instructs users to set bottles to 113° F. But the manual also states that you should set the machine between 122° F and 158° F for “cleaning and disinfection, dry and use,” and that you can manually program it all the way up to 158° F while making a bottle. If a user doesn’t read the manual and isn’t aware that 113° F is recommended, it’s possible for them to make a bottle that heats up to 158° F. When not making a bottle, the Baby Exo can be programmed as high as 176° F to enter its high-temperature cleaning mode, as stated in the manual.
In their manuals, none of these machines purport to destroy bacteria in formula, but Baby Brezza advises, “Always use distilled or boiled water cooled to room temperature.” According to the Centers for Disease Control and Prevention (CDC), most of the time it’s safe to prepare powdered infant formula by mixing it with tap water. When tap water is suspected as being unsafe, or if your baby is younger than 2 months old, was born prematurely, or has a weakened immune system, the CDC recommends mixing formula with very hot water (around 158° F/70° C), which is needed to kill germs that can be present in powdered formula and cause serious infections like cronobacter or salmonella.
Baby Exo’s manual reads less clearly: “Pour pure or cold water into the water tank [...] do not pour the tap water directly for the baby’s health.” It also refers to parts of the water tank as a “boiler” and the water tank cover as a “boiler cover,” which may lead to confusion.
There are two more reasons why temperature matters. The first: Hot water can destroy some of the nutrients in formula. Thiamin, which is “critical for the growth, development, and function of cells,” for example, is destroyed at 212° F. And the most obvious reason is that hot formula can burn your baby’s mouth. It can take 2 seconds of contact with 151° F water for a baby’s mouth to burn and 10 minutes if the temperature is 120° F. “You don’t want [it] to be basically over 120° F because then you can cause burns,” Corkins said. “If you’re going to do this using one of these machines, the goal is to have it make [the bottle] instantly and feed it immediately to the infant. If the temperature’s any higher than that, you’re going to cause mouth burns.”
Cleaning the Formula Makers
Cleaning instructions for the Baby Brezza models are straightforward: Wash the funnel and funnel cover with warm, soapy water and rinse well after every fourth bottle made. Then wipe the powder-dispensing hole on the underside of the powder-dispensing container with a dry paper towel or soft dry cloth. Monthly descaling instructions are included. The company says that with both Baby Brezza models, a clean-funnel symbol illuminates after every four bottles as a reminder to clean the machine. CR didn’t analyze whether the symbol appeared after every fourth bottle. That’s because in our assessment, we continually removed the funnel after each bottle was made to weigh the powder formula that was collected on it.
Because users at home probably won’t remove the funnel after each bottle is made, we acknowledge that the clean-funnel symbol may not have appeared on the Baby Brezza control panels after each fourth bottle we made because the machines were being assessed in a way that differs from how they are probably used at home. Baby Brezza confirmed this in a statement to CR that read: “The ‘clean funnel’ indicator didn’t turn on because the funnel was removed after every bottle. This indicator is tied to a counter and turns on after 4 consecutive bottles are made without the funnel being removed.”
Baby Exo’s cleaning instructions consist of two directives: Clean the funnel every day and clean the powder box every time you refill it. It doesn’t provide a warning of any kind to remind you to do so.
Read more about how CR assessed baby formula makers (PDF).
How Each Baby Formula Maker Performed
After making just one bottle with each machine, we could tell that cleaning all of the parts was going to be more work than we had expected—and the process would be a lot messier—than we thought. But a lot could be forgiven if the machines delivered accurate results, so here’s how each machine fared when it came to formula output and temperature.
Formula Results
Before performing each assessment, we established a lab control using the Similac Advance Infant Formula with Iron. For the first one, our powdered formula control measured 8.6 grams, 0.1 gram off of Similac’s own measurement of 8.7 grams for a scoop. For the second assessment, we performed a control test 10 times, and the average weight of our powdered formula measured 9.3 grams, 0.6 gram more than Similac’s scoop size of 8.7 grams. Several factors can contribute to a lab control differing from a brand’s measurements and slight variations in weight, including whether air bubbles are removed and how much the powder gets packed while scooping it out, according to José Amézquita, a project test leader for CR’s Rapid Response team.
Results for Assessment #1
CR experts often test products as a consumer might use them—and in this case that meant evaluating the machines if we didn’t clean them after the number of uses the manufacturer recommends. When we did this, the average amount of powdered formula discharged from the Baby Brezza Formula Pro Advanced WiFi when we didn’t clean the machine after eight uses was 1.2 grams less than the lab control amount of 8.6 grams. Here’s what that means: If you were to feed your baby the eight bottles we made in this machine without cleaning it, you would run the risk of feeding them 1.2 grams less formula every time a 2-ounce bottle is made than your baby would otherwise consume had we made those eight bottles by hand. If you lose 1.2 grams of powdered formula per bottle, by the eighth bottle you would have lost 9.6 grams, which is equivalent to losing more than one 2-fluid-ounce bottle, according to Amézquita. So even though you have fed your baby eight 2-ounce bottles, they’re consuming the equivalent of less than seven 2-ounce bottles. The rest is water, Amézquita said.
On our next trial with the Baby Brezza WiFi model, we cleaned the machine after the fourth bottle that we made, as per the manufacturer’s instructions. Even after cleaning the WiFi model, it discharged an average of 1.7 grams less formula than the control.
It’s important to note that when the cleaning symbol appeared while assessing bottle temperatures, we heard a loud beeping sound coming from the Baby Brezza Formula Pro Advanced WiFi, and the machine refused to make another bottle until we removed the funnel and cleaned it.
When we prepared three bottles in a row with the WiFi model to assess how caregivers of multiple babies would benefit from it, it discharged an average of 1 gram less powdered formula per bottle than our control.
When we assessed the most popular baby formula maker model, the Baby Brezza Formula Pro Advanced, it discharged an average of 0.9 gram less powdered formula per bottle than our control when we didn’t clean it, and 0.6 gram less formula per bottle when we cleaned the machine.
As for the Baby Exo, the numbers trended in the opposite direction. When we didn’t clean the Baby Exo, it released 0.9 gram more per bottle than our formula control, and when we cleaned it the exact amount—0.9 gram more—was discharged.
Going back to Corkins’ rule of 5 percent—meaning any bottle that has 5 percent more or less formula than the recommended amount per serving can probably affect a baby’s growth—every single bottle we assessed from each of the three formula makers dispersed at least 5 percent more or 5 percent less powdered formula—and sometimes far more or less than that—than Similac’s recommended measurements.
When we judged these formula makers based on Shu’s comments—that a one-time small variation is less concerning than a large or long-lasting variation—we found that all of the weight tests were off in the same direction nearly all of the time, which was verified by CR’s statistics team.
Based on either comment, all three formula makers delivered inconsistent results. In fact, the Baby Brezza Formula Pro Advanced WiFi, on average, dispensed 20 percent less powder than recommended, with individual runs ranging from 11 percent to 26 percent too low.
Results for Assessment #2
When we gathered our data from the second powdered formula assessment, where we followed every manufacturer’s instruction and used both formula and water, we found the following:
2-Ounce Bottle Trial
Baby Brezza Formula Pro Advanced:Produced an average of 15.1 percent less powdered formula than the lab control and 9 percent less powder than Similac’s measurement.
Baby Brezza Formula Pro Advanced WiFi:Produced an average of 22.7 percent less powdered formula than the lab control and 17.1 percent less than Similac’s measurement.
Baby Exo Formula Dispenser Machine:Produced an average of 7.5 percent more powdered formula than the lab control and 15.2 percent more than Similac’s measurement.
Assessment #2: 2-Ounce Bottle
| Baby Formula Maker Brand | Range* (powder in bottle as prepared 2-ounce bottle), grams (n=12) | Average powder in bottle as prepared, grams | Expected amount of powder per formula serving size, grams (1 scoop) | Percent difference from formula serving size |
| Baby Brezza Formula Pro Advanced | 7.19-8.13 | 7.9 | 8.7 | -9% |
| Baby Brezza Formula Pro Advanced WiFi | 4.45-10.07 | 7.2 | 8.7 | -17.1% |
| Baby Exo Formula Dispenser Machine | 8.66-12.59 | 10 | 8.7 | 15.2% |
*Range represents how much variation is expected from trial to trial.
8-Ounce Bottle Trial
Baby Brezza Formula Pro Advanced:Produced an average of 15 percent less powdered formula than the lab control and 9.3 percent less powder than Similac’s measurement.
Baby Brezza Formula Pro Advanced WiFi:Produced an average of 24.3 percent less powdered formula than the lab control and 19.2 percent less than Similac’s measurement.
Baby Exo Formula Dispenser Machine:Produced an average of 4.5 percent more powdered formula than the lab control and 11.5 percent more than Similac’s measurement.
Assessment #2: 8-Ounce Bottle
| Baby Formula Maker Brand | Range* (powder in bottle as prepared 8-ounce bottle), grams (n=12) | Average powder in bottle as prepared, grams | Expected amount of powder per formula serving size, grams (4 scoops) | Percent difference from formula serving size |
| Baby Brezza Formula Pro Advanced | 30.79-32.71 | 31.6 | 34.8 | -9.3% |
| Baby Brezza Formula Pro Advanced WiFi | 27.28-29.01 | 28.1 | 34.8 | -19.2% |
| Baby Exo Formula Dispenser Machine | 34.66-44.36 | 38.8 | 34.8 | 11.5% |
*Range represents how much variation is expected from trial to trial.
Additional Statistics
For the 2-ounce bottle assessment:
- The average amount of powder dispensed by the Baby Brezza Formula Pro Advanced per 2-ounce bottle was 7.9 grams (compared with our lab control of 9.3 grams and Similac’s 8.7-gram measurement).
- The average amount of powder dispensed by the Baby Brezza Formula Pro Advanced WiFi per 2-ounce bottle was 7.2 grams (compared with our lab control of 9.3 grams and Similac’s 8.7-gram measurement).
- The average amount of powder dispensed by the Baby Exo Formula Dispenser Machine per 2-ounce bottle was 10 grams (compared to our lab control of 9.3 grams and Similac’s 8.7-gram measurement).
For the 8-ounce bottle assessment:
- The average amount of powder dispensed by the Baby Brezza Formula Pro Advanced per 8-ounce bottle was 31.6 grams (compared with our lab control of 37.1 grams and Similac’s 34.8-gram measurement).
- The average amount of powder dispensed by the Baby Brezza Formula Pro Advanced WiFi per 8-ounce bottle was 28.1 grams (compared with our lab control of 37.1 grams and Similac’s 34.8-gram measurement).
- The average amount of powder dispensed by the Baby Exo Formula Dispenser Machine per 8-ounce bottle was 38.8 grams (compared with our lab control of 37.1 grams and Similac’s 34.8-gram measurement).
Once again, whether we judge these statistics based on Corkins’ or Shu’s comments regarding the recommended amount of formula preparation, all three of these machines deliver inconsistent amounts of powdered formula.
"Manufacturers need to be more responsive to theSaferProducts.govincident data and ensure tighter tolerance levels are in place for their machines,” said Ashita Kapoor, CR’s associate director of product safety.
A Messy Affair
Even after making just one bottle using the Baby Brezza models, powdered formula spilled onto the funnel cup lid and began to accumulate around the powder container dispenser hole.
Photo: Lisa Fogarty/Consumer Reports Photo: Lisa Fogarty/Consumer Reports
The Baby Exo’s funnel cup opening is slightly wider, which may explain why less powder ended up on the funnel lid, but its dispenser hole also became gunky with formula. With each bottle made, more powder residue accumulated on the funnel lids and powder container dispenser holes of all three machines. When there’s an accumulation of formula and moisture over time, there’s an increased risk of bacterial growth and contamination of the baby formula, both from the formula itself (if contaminated) or from the environment, according to James E. Rogers, PhD, CR’s director, acting head of product safety testing.
During the first assessment, the Baby Exo’s powder container cup released a chunk of watery powder all at once, making a mess on our machine and counter. This happened twice—after the eighth bottle we made in the first trial and after the eighth bottle made in the second trial.
Photo: Lisa Fogarty/Consumer Reports Photo: Lisa Fogarty/Consumer Reports
Temperature Results
When we assessed both Baby Brezza models to check temperatures on their highest settings, the first bottle we made each day averaged around 73° F, not in line with the company’s claim that this setting should deliver a temperature that’s slightly warmer than body temperature, which Baby Brezza said is between 98.6° F and 100° F by their standards. (Johns Hopkins Medicine defines body temperature as ranging from 97.5° F to 98.9° F.) The machine gradually produced warmer bottles. In fact, the highest temperature we recorded was 107° F and the lowest was 100.2° F.
Photo: Lisa Fogarty/Consumer Reports Photo: Lisa Fogarty/Consumer Reports
The Baby Exo was more consistent, but its temperatures were also higher than the Baby Brezza machines. When set to make a bottle at its default temperature of 113° F, the lowest temperature we recorded was 105.2° F and the highest was 110.1° F. All of the temperatures we recorded measured below 120° F. Anything above that temperature, Corkins warned, could cause burns. Instead of giving a baby a bottle directly from a formula maker and assuming the machine has warmed the water to a safe temperature, caretakers should test the formula by shaking a few drops of formula on the inside of a wrist. According to a 2023 study published in Maternal & Child Nutrition, formula should be body temperature when served—cool or warm, but not hot.
How the Companies Responded
In a statement sent to CR, Baby Brezza said that its formula settings are based on extensive testing in its lab to ensure the products dispense the proper formula-to-water ratio. It also said that the reason for the discrepancy between CR’s test results and its own is the significant natural variability that exists in formula powder in general. Baby Exo didn’t respond to CR’s request for comment.
CR reached out to Abbott, the manufacturer of Similac formula. In a statement provided to CR, Abbott said: “Abbott has not studied the performance of formula dispensers. For proper bottle preparation using Similac formulas, we recommend that parents follow label instructions on our powders and use the enclosed scoop which has been evaluated to deliver nutrients per fluid ounce as labeled on the package. As part of our product and packaging development process, Abbott has a comprehensive process in place to determine the weight indicated on our infant formula labels to deliver the nutrients per fluid ounce as labeled.We take into account multiple variances across our process including caregiver variability in measuring an unpacked level scoop, varying formula weights and scoop types enclosed with our formulas.”
The three baby formula makers we assessed have powder containers that must be filled with baby formula before using them—as much as 13 scoops of powdered formula had to be added to each of the containers so that the powdered formula reached the minimum line etched on the powder container cup. This raised the question for our experts of whether the baby formula maker machines are designed in a way that makes it possible for them to meet Similac’s recommendation of using the enclosed scoop in their formula containers that “has been evaluated to deliver nutrients per fluid ounce as labeled on the package.”
CR also reached out to Mead Johnson, the manufacturer of Enfamil formula, but didn’t hear back by publication date.
If you have questions about your Baby Brezza formula maker, call 888-396-6552 or fill out the contact form at babybrezza.com/contact.
Conclusions
The Baby Brezza company promises to make bottles that are “more accurate, consistent, hygienic, & faster than hand scooping . . . ” while Baby Exo claims its machine is “designed for precision and convenience,” will “make preparing formula a breeze,” and can “prioritize safety and simplicity in your parenting journey.” In our assessment, we discovered that they were inconsistent and delivered inaccurate formula-to-water ratio measurements that were often below or above the 5 percent guidelines suggested by Mark R. Corkins, a pediatric gastroenterologist. (In the case of Baby Brezza Formula Pro Advanced WiFi, they averaged up to 19 percent from Similac Advance Infant Formula with Iron’s measurement.) Our one-time experience was that they required work to dig deeper and find out the correct formula setting with a call to customer service. Machines certainly require frequent cleaning that includes removing their funnels and funnel lids, washing and rinsing them, waiting until they dry fully before using them again, and wiping down the dispenser hole, which became gunky with powdered formula after each bottle we made.
While the CDC notes that in most cases it’s safe to prepare powdered infant formula by mixing it with tap water, Baby Brezza’s manuals go one step further by noting you should always boil water beforehand and wait for it to reach room temperature before adding it to the machine, or that you use distilled or bottled water (suitable for infant formula preparation).
We also found that bottle temperatures fluctuated for all of the machines. Your bottle may be too hot to give to your baby straight away or not as warm as you want it to be. Whether or not you feel they’ll save you time is a personal decision.
But if you’re looking for consistency so that you can feel confident your baby is getting the exact amount of formula they need, we found that these machines fall short.
@consumerreports Reminder: Never freeze or microwave baby formula. If you need to warm it up, put it under warm water. Discover other expert baby advice through the link in our bio. #babytok #parentsoftiktok #parenting #babytiktok ♬ original sound - Consumer Reports
Lisa Fogarty
Lisa Fogarty is a multimedia content creator at Consumer Reports. She studied journalism at Columbia University and has written numerous health, parenting, fitness, and wellness articles for The New York Times, Psychology Today, Vogue, and NPR. Lisa is passionate about mental health and is a co-creator of The Hunger Trap Podcast, which focuses on eating disorders. In her spare time she surfs, plays the guitar, and kickboxes. Follow her on X.
