Baby Products BPA Free Giveaway Review

Yoomi Self-Warming (BPA Free) Baby Bottle Review & Giveaway (CLOSED 8/30)

Yoomi Self Warming Bottle 1

The Yoomi is a bottle and warmer in one, that warms a baby’s feeding to the natural temperature of breast milk in 60 seconds.

Yoomi Self Warming Bottle 2 packagingYoomi Self Warming Bottle 3 packaging
Yoomi Self Warming Bottle 4 packagingYoomi Self Warming Bottle 5 packaging

As I mentioned in my post about my breastfeeding experiences, neither of my kids were wild about the bottle. I suspect my milk has excess lipase (so I am definitely going to try scalding it next time before storing!) but I’m guessing it’s probably also because I really had no clue how to warm it. You don’t want to microwave or overheat breast milk, not just because of potential hot spots, but also because it can destroy some of the good stuff in it. I tried microwaving water, then putting the bottle in it to warm…took forever and I was never sure if it was warm enough. Tried running it under hot water…same thing. I never bought a bottle warmer since bottles were so rare in our house anyway, but a warmer can’t be used away from home, doesn’t necessarily heat it evenly or to the ideal temperature, and it warms the whole bottle at once, so it gets cool as the baby drinks.

Yoomi Self Warming Bottle 6 bottle with warmer

Still, I would love to have a bottle that’s easy to use and heat, so that there’s the option of me running out to the store by myself, or maybe even getting out with my husband.

Yoomi Self Warming Bottle 7 all pieces

The Yoomi self-warming bottle has to be one of the coolest (warmest? Har har) ideas I’ve seen. It consists of a BPA free, easy to hold bottle (available in 5 oz and 8 oz sizes), a naturally shaped nipple with anti colic vents (available in slow, medium and fast flow), a collar to hold it on obviously, cap, and the warmer.

Clearly, the warmer is what makes it stand out. The warmer warms milk to the natural temperature of breast milk (89.6-93.2 degrees) in 60 seconds, without plugs, batteries, hot water etc. The warmer uses the same gel that is used in hand warmer packets, which is a concentrated, non-toxic salt solution (also used in ice cream.) Yoomi has also added a food grade colorant and Bitrex (a safe but bitter substance) so that if the warmer leaked, not only would you see it, but the baby would refuse to consume the feeding.

The Yoomi came with a fantastic pamphlet that tells you just about everything you need to know.

Yoomi Self Warming Bottle 8 step 1 flyerYoomi Self Warming Bottle 9 step 1 warmer new

The first thing you need to do is charge the warmer, which you do by boiling it for 25 minutes. You can also use a steam sterilizer with 4x the recommended amount of water, but the warmer cannot be placed in the microwave.

Yoomi Self Warming Bottle 10 step 2 boil 25 minYoomi Self Warming Bottle 11 water boiling

I used a 3 quart pot the first time, but a 4 quart would have worked much better, since so much water evaporates during the boiling time!

Yoomi Self Warming Bottle 12 lowered in with tongsYoomi Self Warming Bottle 13 boiled on its side 25 min

Once the water was at a full boil, I lowered the warmer in with tongs, and boiled it for 25 minutes.

Yoomi Self Warming Bottle 14 step 3 flyerYoomi Self Warming Bottle 15 step 3 cool 75 min

Carefully remove the warmer (I used the tongs again) and allow it to cool on it’s side, on a clean surface for an hour and 15 minutes. The orange button turns blue after you boil it; it should be back to orange, cool to the touch, and rattle when shaken before you use it. You shouldn’t depress the button before it’s fully cooled, or you could damage the warmer. You can also cool it more quickly by running it under cool water, but of course it will no longer be sterile.

Yoomi Self Warming Bottle 16 step 4 flyerYoomi Self Warming Bottle 17 step 4 cooled sounds sloshy

If the warmer sounds slushy, rather than rattl-ey, you may not have boiled it long enough. I believe not having quite enough water the first time caused me to have a slightly sloshy sound (and it also took a bit longer for the warmer to fully activate/button to turn blue.) If you’ve used enough water, but this happens, try adding 5 minutes to the boil time.

Yoomi Self Warming Bottle 18 flyer ready to feedYoomi Self Warming Bottle 19 nipple goes into collar
Yoomi Self Warming Bottle 20 capYoomi Self Warming Bottle 21 cap compresses nipple stops leaks

Yoomi Self Warming Bottle 22 use to pick warmer upYoomi Self Warming Bottle 23 picked warmer up
Yoomi Self Warming Bottle 24 screw onto bottle

Use the bottle to pick the warmer up to assemble it. You can store the charged warmer, and it will be ready to use pretty much indefinitely. You can go ahead and fill the bottle, and store the whole shebang in the fridge, and it will still work (perfect for outings with Dad, or to take to the babysitter.) The Yoomi can be used with breast milk or pre-mixed formula.

Yoomi Self Warming Bottle 26 temp before

For my photo demo, I used water stored in the fridge; this was it’s temp before.

Yoomi Self Warming Bottle 25 flyer press button through nippleYoomi Self Warming Bottle 27 push button
Yoomi Self Warming Bottle 29 turn upsidedown 30 seconds

When you’re ready to use it, just press the orange button and wait 30 seconds, then turn the bottle upside down and wait another 30 seconds. If you stare at the bottle while you’re waiting, you’ll see the orange start to fade. When it’s blue, you know it’s fully activated. As I said earlier, mine took a bit longer to reach this stage, I believe because I didn’t have it in quite enough water while boiling!

Yoomi Self Warming Bottle 30 flyer feedYoomi Self Warming Bottle 31 temp of warmed water squeezed out

The Yoomi warms the feeding as it flows past the channels in the warmer, so it’s actually warming the milk as the baby drinks, rather than warming it all at once (and having it start to get cool while baby drinks.) So, I squeezed some of the warmed water out into the bottle cap to measure the temp. It took me a while to squeeze out enough to measure the temp, so it had cooled a bit by the time I managed to do it! This temperature is much like the natural temperature of breast milk (slightly cooler than your body temp), which makes it easier for the baby to go back and forth between breast and bottle. They are less likely to refuse it because it’s too hot or too cold, and they won’t develop a preference for extra-warm bottles. You cannot overheat the milk, so you never have to worry about the baby being burned. The warmer continues to warm for an hour, so the last drop will be just as warm as the first. You of course want to keep the bottle upside down during the feeding, so if the baby needs a break, put the cap on and place it upside down, so the milk in the nipple will be warm when baby is ready again.

Yoomi Self Warming Bottle 32 flyer when it's ready to be replacedYoomi Self Warming Bottle 33 flyer 100 uses or 3 months after first use

The warmer can be used up to 100 times, or three months after it’s first use. I read this, but it didn’t sink in before I broke it out to test it, so I will have to buy another warmer before I can try it with the baby in December! Oops! Yoomi is working on a way to easily look at the warmer and know it’s ready to be replaced, but for now, you know if it doesn’t rattle when charged, the button doesn’t change color, or if the base of the warmer is permanently bulging out. It comes with a little chart to tick off each time you charge it.

Initially, I was a little overwhelmed by all the info, and unsure if I’d be able to figure it out, but it was really quite easy! I made a quick video demonstrating:

All the pieces are interchangeable, and the bottles can be used without the warmer. Either size bottle with nipple has an MSRP of $10.95. Nipples alone are $6.95 for a 2-pack, and a single warmer is $25.95. You save when you buy a bottle with warmer for $32.95. Initially, it seemed pricey to me but it’s really 25 cents per use, and it can be used anywhere, anytime, takes just 60 seconds, warms to the ideal temperature, and warms as you feed. No other warming method can do that.

Yoomi is designed and assembled in London England, but you can purchase the products online from Yoomi or buy Yoomi on Amazon (affiliate link.)

Giveaway: One reader will receive a 5 oz. Yoomi bottle with warmer (ARV $32.95.) Entries go in the Rafflecopter form below! You may view Rafflecopter’s Privacy Policy.

FTC compliance: I received the pictured product at no cost in order to review it. I was not compensated for this post and all opinions are my own. This post contains a single Amazon affiliate link.

Disclosure: This giveaway is not sponsored, endorsed or administered by, nor associated with Facebook. By entering, you release Facebook from any responsibility and understand that the information entered on this form will not be disclosed to Facebook.

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Maria Moser
Maria is the mother of 3, writing about cloth diapers & going green. You'll often find her juggling her preschooler and typing 1-handed in between sips of cold coffee. Maria works with many companies within the cloth diaper industry and beyond, providing social media management, product development and other services.
  • November 11, 2011 at 9:01 am

    […] you missed my Yoomi self-warming bottle review a few months ago, check it out. Today, I want to tell you about a contest Yoomi USA is running on […]

  • Bethany Madrid
    August 29, 2011 at 11:29 pm

    great giveaway!

  • Stephanie Adkins
    August 29, 2011 at 12:18 pm

    Stephanie Adkins

    Great prize!

  • Robin Scott
    August 28, 2011 at 10:45 pm

    looks cool, thanks

  • Sunnie
    August 27, 2011 at 10:16 am

    These are really cool, I would probably read the directions real careful just in case.

  • August 26, 2011 at 12:03 am

    […] a link and description to maria at, or Fill out my contact form for readers. My Yoomi Self Warming Baby Bottle Giveaway ends 8/30 […]

  • Brittany Ott
    August 25, 2011 at 3:00 pm

    This would be so cool to have~! I love it!

  • Natalie Padilla
    August 24, 2011 at 5:39 pm

    This is cool!

  • August 23, 2011 at 9:45 pm

    Wow! This is so neat! It would have come in handy when mine were little!

  • Shira
    August 23, 2011 at 1:16 pm

    This is so cool. Wish I’d had these when bottle feeding.

  • August 23, 2011 at 11:06 am

    Wow, that is the neatest thing I have seen. I love how the bottle looks like a breast. Maybe my little one will actually take this.

  • misty moragn
    August 23, 2011 at 10:29 am

    I could really really use this right know especially since we do not have the money to buy one at this time or anytime soon

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