This 260 ml / 9 oz Philips Avent baby bottle features an integrated anti-colic valve designed to prevent air from entering your baby's tummy, significantly reducing colic, gas, and reflux. The slow-flow nipple has a special ribbed texture that prevents collapse to guarantee comfortable and uninterrupted feeding. Made from lightweight, 100% BPA-free materials, its wide neck and minimal parts ensure that it is incredibly quick to assemble and easy to clean thoroughly.