Anti-Colic Valve: The teat features an anti-colic valve that is proven to reduce colic and discomfort in babies. This valve allows air into the bottle to prevent vacuum build-up, venting it towards the back of the bottle and away from the baby's tummy during feeding. 60% Less Fussing at Night: Babies fed with Philips Avent Anti-colic bottles experienced 60% less fussing at night compared to babies fed with a competitor's anti-colic bottle, as per the manufacturer's claim. Ribbed Texture: The teat has a ribbed texture that prevents collapse, ensuring uninterrupted and comfortable feeding. This texture also helps in providing a secure latch for the baby. Different Flow Rates Available: The AVENT Anti-Colic bottle range offers teats with different flow rates to accommodate your baby's growth and feeding needs. The available flow rates include Newborn, Slow, Medium, Fast, Variable Flow, and Thick Feed. BPA-Free: The teat is made of BPA-free silicone material, ensuring safety for your baby. Overall, the AVENT Anti-Colic Teat is designed to provide support for uninterrupted feeding while reducing colic and discomfort in babies. It offers flexibility with different flow rates and prioritizes safety with its BPA-free construction.