This 240 ml / 8 oz Philips Avent Natural baby bottle is crafted from premium-grade pharmaceutical borosilicate glass, which is highly resistant to thermal shocks and completely BPA-free. The wide, breast-shaped nipple closely mimics natural breastfeeding to simplify combining breast and bottle feeding. Engineered with an advanced double-valve anti-colic system, it actively directs air into the bottle rather than the baby's tummy to drastically minimize gas and colic. Its wide-neck design makes filling and sterilization effortless.