The Natural Response Teat releases milk only when the baby actively drinks. Babies can drink, swallow and breathe using their natural rhythm, like on the breast. Making it easy to combine breast and bottle feeding   Teat releases milk when baby actively drinks The Natural Response Teat works with your baby's natural feeding rhythm, making it easy to combine breast feeding and bottle feeding. The teat has a unique opening which only releases milk when the baby actively drinks. So when they pause to swallow and breathe, the milk pauses too. Natural latch on with breast-shaped teat The wide, soft and flexible teat is designed to mimic the shape and feel of a breast, helping the baby to latch on and feed comfortably. Designed to reduce colic and discomfort Anti-colic valve is designed to keep air away from baby's tummy during feeding, to help reduce colic and discomfort.