Vented Base for Guaranteed Comfort.The patented Anti-Colic vented base ensures babies can drink calmly and relaxed: Ventilation holes regulate the pressure balance. The milk can flow evenly without bubbles, without foaming. Simply relaxed.Proven effectParents have tested the Anti-Colic with the innovative vented base and 80% clearly say what they and their babies gained from using it: No more air swallowing, relaxed drinking, quiet nights. (Market research 2009, tested with 121 mothers)MAM design is innovative in form and function. And practical: Simply unscrew the Anti-Colic bottle base for cleaning. But please, only for cleaning the bottom must be screwed tight when drinking to take advantage of its high-tech effect! Guaranteed lead-proof.Ultra soft silicone nipple for an easy switch between mum and MAMBreast feeding is best for babies. MAM designers have created a silicone nipple which makes switching between mum and MAM especially easy thanks to its patented silk surface.Sterilization, scientifically tested and so simpleThe Anti-Colic can be reassembled for self-sterilizing in 3 easy steps. It can be sterilized in the microwave quick and easy without a separate sterilizer. Also ideal for on the go!Easy To Use The leak-proof cap is ideal for the dynamics of everyday baby life. It can also be used as a measuring cup.Ultra Soft Silicone - MAMs patented Silk Nipple is silicone with a difference: its silky soft. No other silicone feels softer.Functional Design Wide openings for easy filling and cleaning.Innovation - The vented base helps to minimize colic by reducing air swallowing.