Larger size anti-colic bottle for babies over 6 months old with fewer larger milk feeds each day. Comes with a newborn teat. Philips Avent Anti-colic bottles are clinically proven to reduce colic and discomfort. Babies fed with our Anti-colic bottles experienced 60% less fussing at night than babies fed with a competitors anti-colic bottle. The anti-colic teats has a built in anti-colic valve that is designed to keep air away from your baby's tummy to reduce colic and discomfort. As your baby feeds, the valve integrated into the teat flexes to allow air into the bottle to prevent vacuum build up and vents it towards the back of the bottle. The teat shape allows secure latch and the ribbed texture helps prevents teat collapse for uninterrupted, comfortable feeding. Pull teat completely through white ring - prepare bottle with breast milk or formula. Screw white ring onto bottle. After each feed wash bottle and sterilise before next use. BPA free. Always wash bottles after use and before sterilising.