The Philips Avent Anti-colic teat is a BPA-free silicone nipple specifically designed for babies aged one month and up, featuring a "Flow 2" slow flow rate. It is clinically proven to reduce colic and discomfort by utilizing an integrated anti-colic valve that flexes as your baby feeds, directing air into the bottle and away from the infant's stomach to prevent vacuum buildup. Designed for uninterrupted and comfortable feeding, the teat features a ribbed texture that prevents the nipple from collapsing while the baby latches on. The naturally shaped silicone is soft, odorless, and flavorless, making it suitable for babies who are either exclusively bottle-fed or transitioning between breast and bottle. For hygiene and safety, it is recommended to replace these teats every three months.