What is included 2 pcs, 4oz Anti-colic with AirFree™ vent baby bottles 2 pcs, 9oz Anti-colic with AirFree™ vent baby bottles 1 pc, Orthodontic soother 1 pc, Bottle and teat brush Designed to reduce colic, gas and reflux* The AirFree™ vent is designed to help your baby swallow less air. The teat stays full of milk, even when horizontal, for upright feeding. Reducing the air a baby ingests can help ease common feeding issues like colic, gas and reflux. • Locks milk in, keeps air out, for easy upright feeding • Teat stays full of milk, not air • Anti-colic system proven to reduce colic and fussing* • Easy to clean & assemble, as AirFree™ vent is a single piece • Teat shape designed for a secure latch-on • Simple to use • Use your bottle with or without the AirFree™ vent • Different teat flow rates available • Mix and match with other Philips Avent products