In-depth baby product reviews led by a Pediatrician

Grownsy Fast 5-in-1 Review

Affordable warmer with simple controls but below average performance
Grownsy Fast 5-in-1
Credit: Grownsy
  • 1
  • 2
  • 3
  • 4
  • 5
Price:   $29 List | $20 at Amazon
Pros:  Inexpensive, easy to clean, simple to use
Cons:  Inefficient, difficult to understand instructions, no auto-shutoff
Manufacturer:   Grownsy
By Abriah Wofford ⋅ Senior Review Editor  ⋅  Oct 8, 2020
  • Share this article:
Our Editors independently research, test, and rate the best products. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. Learn more
51
OVERALL
SCORE


RANKED
#11 of 12
  • Warming Efficiency - 25% 5
  • Ease Of Use - 30% 4
  • Health/Safety - 40% 6
  • Ease of Cleaning - 5% 5

The Skinny

The Grownsy Fast 5-in-1 is a product that has multiple settings for heating your baby's food at a convenient speed. It can also warm baby food and act as a sterilizer for bottles or pacifiers. Utilizing both steam and water bath technology, this affordable warmer packs in a lot of versatility. However, during testing, we found that all of its functions perform slightly below average compared to other products. For these reasons, we were less than impressed with the overall performance of the Grownsy, and we recommend checking out other bottle warmers before making your final decision.

Compare to Similar Products

 
Grownsy Fast 5-in-1
Awards  Editors' Choice Award Editors' Choice Award Best Value Award Top Pick Award 
Price $29.00 List
$19.99 at Amazon - 31% off
$43.00 List
$45.44 at Amazon
$70.00 List
$49.34 at Amazon - 30% off
$35.00 List
$34.99 at Amazon
$20.00 List
$17.97 at Amazon - 10% off
Overall Score Sort Icon
51
80
76
73
66
Star Rating
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
  • 1
  • 2
  • 3
  • 4
  • 5
Pros Inexpensive, easy to clean, simple to useSimple to operate, versatile, consistent temperaturesWater bath, user-friendly, versatile, timer in minutesSimple, safe, keep bottle warm for up to an hourInexpensive, travel friendly, easy to use
Cons Inefficient, difficult to understand instructions, no auto-shutoffAverage heat time, frequent mainteneceExpensive, no end of cycle beep, multiple cleaning stepsSlowerNo auto-shutoff, only works for one bottle
Bottom Line Simply designed bottle warmer with sub par efficiency and confusing instructionsReliable and effective warmer that will accommodate almost any bottleSimple interface with consistent warming and works with most bottlesConsistent heat and easy to use make this warmer a good buyThis versatile and convenient warmer is great for families who are always on the move
Rating Categories Grownsy Fast 5-in-1 Tommee Tippee... Kiinde Kozii Chicco NaturalFit Tommee Tippee...
Warming Efficiency (25%)
5
7
5
6
6
Ease Of Use (30%)
4
9
8
9
6
Health Safety (40%)
6
8
9
7
7
Ease Of Cleaning (5%)
5
6
6
5
9
Specs Grownsy Fast 5-in-1 Tommee Tippee... Kiinde Kozii Chicco NaturalFit Tommee Tippee...
Heat Technology Steam/Water Bath Water Bath Water Bath Water Bath Water Bath
Temp or Timer Based Have to manually turn off Timer Timer Temperature N/A
Auto Shut Off No Yes Yes Yes No
Audible Beep No Yes No Yes No
Water Resevoir No No Yes Yes No
Wide Bottle Capacity yes Yes Yes Yes Yes
Compatible w/ Glass Yes Yes Yes Yes Yes
Compatible w/ Breast Pump Bags No Yes Yes No Yes
Warming Wait Time 12:00 min:sec 5:00 min:sec 5:30 min:sec 9:15 min:sec 5:30 min:sec
Wait Time Between Warmings Not Listed Not Listed If Kozii feels warm around the base (from recent use), decrease warming time by 30 seconds. Allow bottle warmer to cool completely (approx 30 min) None
Dimensions 6"H x 4.75"L x 4.75"W 7.5"H x 6"L x 5"W 6"H x 6.4"L x 4.7"W 6"H x 5.5"L x 5.25"W 7.75"H x 3.5"L x 3.5"W
Temp. & Time at Auto Shut-Off w/ Warmer Chart Recommended Setting (4oz Refrig. Milk in Glass w/ Silicone Sleeve) NA 5:00 min:sec 86F 5:30 min:sec 79F 9:00 min:sec 94F NA
Max Temp if Left in Warmer 12 minutes 90F 109F 94F 104F 111F

Our Analysis and Test Results

Founded in 2015 in Los Angeles, California, Grownsy is a company that has a small selection of baby products designed to simplify the parenting process. They make two other bottle warmers with varying capabilities. The Fast 5-in-1 is the most basic option offered.

Performance Comparison


The Grownsy can be used with or without the plastic lid.
The Grownsy can be used with or without the plastic lid.
Credit: Abriah Wofford

Health and Safety


The Grownsy Fast earned an average score for health and safety. It has the option to heat via water bath or steam, depending on the rate you want your milk to warm. Grownsy recommends the water bath function for a slow and steady method, which we also prefer. When using this setting, the milk temperature never rose above 90F; however, it took a full 12 minutes to get there. We think this is much longer than most parents will want to wait, and many may find it tempting to use the fast warm function. If you choose to go this route, you must be very attentive. In our tests, the temperature quickly rose to the ideal 99F. However, if left for just a few minutes too long, the milk soon jumps to well above 104F, at which point breastmilk will start to lose essential nutrients. At the end of our 12 minute test period, the highest recorded temperature was nearing 160F. Much too hot to be safely handled and past the point of nutrition degradation. Without a beep or auto-shutoff alert, you may end up wasting a full bottle of milk.

The Grownsy has a simple dial operation with symbols representing...
The Grownsy has a simple dial operation with symbols representing different warming cycles.
Credit: Abriah Wofford

Ease of Use


With only one dial, you would assume that operation would be simple. However, the symbols are not very explicit or intuitive. We found the instructions to be full of grammatical errors and misspellings, making them very difficult to follow overall. We were scratching our heads trying to figure out which setting to use, how much water to fill, and when to remove the bottle. The max fill line is in Chinese, and there is no timed shutoff and no audible signal to let you know when a bottle is ready. There is only a safety shutoff to prevent the machine from heating when there is no water left.

The Grownsy was one of the slowest products when it came to warming...
The Grownsy was one of the slowest products when it came to warming 400ml of milk in a glass bottle.
Credit: Abriah Wofford

Warming Efficiency


We put each machine through multiple rounds of heat testing to measure their efficiency and functionality. The Grownsy had a below-average warm time. It took 12 minutes to reach 90F when following the manufacturer's recommended settings. There is no auto-shutoff, but at this rate, parents will likely take the bottle out well before there is a risk of overheating.

A chemical descaler is included when you purchase a Grownsy bottle...
With a total of three parts, the Grownsy is relatively simple to...

Ease of Cleaning


The Fast bottle warmer has 2-3 parts that need cleaning, depending on the warming method you use. The cleaning instructions are minimal, only noting to let the warmer cool and then wipe it with a damp rag after use. The removable parts may be hand-washed, but there is no statement noting whether they are dishwasher safe. You should descale every four weeks, and a chemical descaler comes with the package to get you started. Grownsy notes that you can also descale with a white vinegar solution. However, the instructions are crammed with grammatical errors and confusing sentences, turning a simple process into a complicated experience.

Manufacturer Video



Abriah Wofford