Baby's healthy diet and sleep plays an important part in his early development. With Avent Anti-Colic With AirFree Vent Feeding Bottle, SCF813/14, stay assured that your baby is getting the right amount of feed on time. Its anti-colic valve technology helps stop air stay inside the bottle, while allowing only milk to pass through. By blocking air, it prevents digestive issues that could disturb your baby at night. It reduces the chances of gastric issues, spit-ups, and over-feeding. It is an easy to wash and reuse bottle.