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As your baby feeds, the valve integrated into the nipple flexes to allow air into the bottle to prevent vacuum build up and vents it towards the back of the bottle. It keeps air in the bottle and away from baby's tummy to help reduce gas, spit-up and burping.
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As your baby feeds, the valve integrated into the nipple flexes to allow air into the bottle to prevent vacuum build up and vents it towards the back of the bottle. It keeps air in the bottle and away from baby's tummy to help reduce gas, spit-up and burping.