The Philips Avent Anti Colic Bottle is designed to reduce colic and discomfort by keeping air away from the baby's tummy. It features an integrated anti-colic valve and ribbed texture to prevent teat collapse. The bottle is easy to clean, assemble, and is BPA-free. Ideal for newborns and up, it ensures uninterrupted feeding. Key FeaturesClinically proven to reduce colic Key Materials: Bottle made of Polypropylene (PP); Silicone anti colic teat.Experts in baby care essentials and clinically proven anti-colic solutions.Use With Or Without The Airfree VentInspect bottle and teat regularly. Never warm milk in the microwave (uneven heating/scalding hazard). Use under adult supervision.