Pigeon SofTouch Wide Neck Nipples are specially designed for 1+ months of babies with S-size nipples. The opening of the nipple is a round-hole that matches with little one’s flow.Global No.1* Nursing Bottle Brand, trusted by mums all around the worldImproved Softness: 100% soft and flexible silicone nipple! Flexes and mimics a mum’s breast which results in easy latching and seamless breast-to-bottle transition. The perfect shape and size to fit into the sucking fossa of babyLatch-On Line: Perfect solution for latching issues! It guides the mother and the baby in an appropriate latching positionAnti-Colic System: Air valve design on the base of the nipple which allows a constant flow of feed with less ingestion of air; designed for tiny tummies.Based on extensive research on feeding, the 3 key factors are involved in a baby?s natural sucking behavior: Latching onSucking (peristaltic tongue movement) SwallowingSterilization Method: Boiling, Steam, Chemical & UV