Philips Avent natural response T1 0 month teats only release milk when the baby sucks actively. Babies can drink, swallow and breathe in their natural rhythm, just like at the breast. This makes it easier to combine breastfeeding with a bottle. The drip-free design The teat opening is designed to release milk only when the baby is sucking. In this way, milk loss can be avoided, anywhere. Teat releases milk when baby actively sucks The Natural Response teat adapts to the baby's natural feeding rhythm, making it easy to combine between breastfeeding and bottle feeding. The teat has a single opening that only releases milk when the baby sucks actively. So when the baby stops to swallow and breathe, the flow of milk also stops. breast-shaped teat The wide, soft and flexible teat is designed to mimic the shape and texture of the breast, helping baby latch on and feed comfortably. Designed to reduce colic and discomfort The anti-colic valve has been designed to reduce air intake from the baby's tummy during feeding, helping to reduce colic. It is recommended for newborn babies. Store in a cool, dry place.