Philips Avent Anti-Colic Baby Bottle, 11 oz, with Anti-Colic Nipple Flow 3 promotes your baby s comfort and well-being during feeding. The clinically proven anti-colic valve is integrated into the nipple to help reduce colic and gas by minimizing air ingestion. The unique valve flexes to prevent vacuum buildup and directs air away from your baby s tummy. The nipple is designed to resist collapse, ensuring a secure latch and uninterrupted feeding.