9 oz/260 ml. Clinically proven to reduce colic and discomfort (At 2 weeks of age babies fed with a Philips Avent bottle showed a trend to less colic than babies fed with a conventional bottle. At 2 weeks of age babies fed with a Philips Avent bottle showed a trend to less fussing than babies fed with another leading bottle). Anti-colic system. Easy to clean for healthier feeding. Fewer parts. BPA free. No. 1 bottle brand (No. 1 bottle brand in America). Clinically Proven Anti-Colic System (At 2 weeks of age babies fed with a Philips Avent bottle showed a trend to less colic than babies fed with a conventional bottle. At 2 weeks of age babies fed with a Philips Avent bottle showed a trend to less fussing than babies fed with another leading bottle): Unlike some other bottles, the clinically proven anti-colic system is integrated into the nipple. As your baby feeds, the unique valve on the nipple flexes to allow air into the bottle instead of your baby's tummy. Designed to reduce colic, spit-up, burping and gas. Easy to Clean for Healthier Feeding: With its wide bottle neck, and rounded corners, our bottle is easier to clean quickly and thoroughly. Ease of cleaning helps to ensure more hygienic, healthier feeding. Ergonomic Shape: Comfortable shape, easy to hold even for baby's tiny hands. Simple to Use and Assemble: Only 4 parts for quick and simple assembly. No. 1 Bottle Brand (No. 1 bottle brand in America): Trusted by Moms: For over 30 years. Choosing the Right Nipple: Different flow rates to keep up with your baby's growth. Use the Philips Avent Classic+ bottles only with Philips Avent Classic+ feeding nipples. 1 M+: slow flow. We recommend you replace nipples every 3 months for hygiene reasons. Replace: 3 m. Growing With Your Baby: Compatible range from breastfeeding to cup. For product information or advice please call our customer care line. Call Toll-Free: 1.800.54-Avent. www.philips.com/Avent. FSC. Made in England.