Tommee Tippee Advanced Anti-Colic bottles are specially designed to prevent colic by reducing air bubbles in the milk and to encourage a good latch-on during feeding. Meaning 80% fewer colic symptoms such as wind, reflux and fussing. And 100% more smiles. This is no ordinary bottle. It works a little differently from regular bottles to help combat colic while ensuring a comfortable feeding experience for you and your baby. The unique anti-colic venting system draws air away from milk. Plus, our venting tube comes with a built-in heat sensing strip that gives you extra reassurance that milk is not too hot for a comfortable feed. And the anti-colic teat flexes and stretches naturally to ensure a good latch. Our bottles are inspired by what babies love most: mum. With the most breast-like teat ever made, this baby bottle flexes like mum and feels like mum because babies prefer it that way.