Philips Avent Natural 2.0 Feeding Teats 6 Month+ provide soft and anti-collapse ribbed teat designed for growing babies. The comfort petals and natural teat shape allows natural latch on and makes it easy to combine breast and bottle feeding. Their wide breast shaped teats promote a natural latch on similar to the breast, making it easy for the baby to combine breast and bottle feeding. Petals and ridges inside the teats allow flexibility without collapse, for an uninterrupted feed. These teats have anti-colic valve which is designed to keep air away from the baby�s tummy, and to help reduce colic and discomfort.