Bottle Feeding Twin Pack RegularOur Anti colic bottles with anti colic valve system and textured nipple is designed to minimize feeding interruptions and discomfort. With its clinically proven* integrated anti colic valve, air is vented into the bottle and away from the baby's tummy. The teat shape allows secure latch and the ribbed texture helps prevent collapse for uninterrupted, comfortable feeding. *Clinical studies have shown that the Philips Avent bottle reduces colic and