This 125 ml / 4 oz Philips Avent baby bottle features a clinically proven anti-colic valve engineered to redirect air away from your baby's tummy to significantly minimize gas and reflux. It comes with a newborn-flow nipple (0m+) that has a unique ribbed texture to prevent collapse and promote continuous, rhythmic feeding. Completely BPA-free, its lightweight and wide-neck design ensures swift assembly and effortless cleaning.