Hailed as one of the top 10 British inventions of the decade, the yoomi self-warming bottle warms milk to perfect breastmilk temperature in just 60 seconds at the touch of a button… the fastest warming system in the world. Traditional bottle warming can overheat the milk damaging the essential nutrients your baby needs. The yoomi system carefully controls the warming process, so the vital nutrients in breastmilk and formula never get damaged. Yoomi's self warming bottles are fully portable, warming your baby’s feed in just 60 seconds, anytime, anywhere. So they’re perfect when you’re out and about or for those middle of the night feeds. Just press the orange button and the smart technology in the yoomi warmer will warm the milk, straight from the fridge, in 60 seconds. The cold milk is gently heated as it flows through the specially designed channels on the outside of the warmer. By the time the milk reaches the teat, it’s at perfect breastmilk temperature (32-34 deg C). The smart warmer will stay warm for up to one hour. It uses the same gel as found in hand warmers, a non-toxic, food grade concentrated salt solution (also used in ice cream). To charge the warmer, you can boil them, use a bottle warmer, or the microwave. Read instructions carefully before using the Yoomi warmer.