The Philips Natural Response dummy releases milk only when the baby is actively drinking. The baby drinks, swallows and breathes with its natural rhythm like on the chest. Easy to combine breastfeeding and bottle. Anticolic bottles for babies keep the air away from the babys stomach when breastfeeding, reducing colic and discomfort. The wide, soft and flexible dummy of the Philips bottle mimics the shape and texture of the female breast and helps the baby to suck and drink peacefully. The Natural Response dummy works according to the babys natural breastfeeding rhythm, so you can easily combine breastfeeding and bottle. The dummy has a unique opening that only releases the milk when the baby is actively drinking. When it stops to swallow and collect air, the milk also stops flowing. Every child is different and develops at their own pace. Find the perfect spout for your baby and adjust the bottle to their needs. The dummy hole releases the food only when the baby sucks. This allows us to avoid milk loss at home or on the go. Philips Avent Natural bottles and dummies are made from BPA-free material. Our new Natural Response glass baby bottles are different from baby bottles with free spout. Just like breastfeeding, you have to get used to it. It is completely natural. Includes 2 dummies with 1 x 0% BPA, according to EU Directive 10/2011