Designed to mimic natural feeding and tailored to the sucking pattern of your 3 month+ aged baby, Avent's 330ml anti-colic bottle reduces baby's air swallowed during feeds, lessening their wind, tummy cramps and irritability. The teat shape ensures a secure latch, and the ribbed texture prevents teat collapse for comfortable feeding. This leak-free design features a wide opening that is great for easy filling and cleaning.