The Avent Anti-colic bottles with anti-colic valve system and textured nipple are designed to minimize feeding interruptions and discomfort. With its integrated anti-colic valve, air is vented into the bottle and away from the baby's tummy. Unique anti-colic valve – designed to reduce air ingestion Avent's clinically proven anti-colic valve is designed to reduce colic and gas. Clinical studies have shown that the Philips Avent bottle reduces colic and fussing. Fussing is significantly reduced at night as babies fed with Philips Avent anti-colic bottles experienced 60 % less fussing than babies fed with a leading competitor’s vented bottle. Ribbed texture prevents collapse for uninterrupted feeding The nipple shape allows secure latch and the ribbed texture helps prevents collapse for uninterrupted, comfortable feeding. Nipple shape designed for secure latch The nipple is designed not to collapse, for a secure latch and uninterrupted feeding. Leak-free design Our Anti-colic bottle is designed to prevent leakage whilst feeding, for a truly enjoyable feeding experience. Easy to clean and assemble with few parts The anti-colic bottle has few parts for quick and simple assembly. Easy to hold The unique bottle shape makes this bottle easy to hold and grip in any direction Wide neck bottle with rounded corner for easy cleaning With its wide neck and fewer parts, our bottle is easier to assemble and to clean quickly and thoroughly Compatible range from breastfeeding to cup Mix and match our breast pump, bottle and cup parts, and create the product that works for you, when you need it! This bottle is BPA free Philips Avent Anti-colic bottle is made of BPA free material (PP) Compatible with Anti-colic range Full Compatibility with Philips Avent Anti-colic bottle with or without AirFree vent.