Designed to reduce most common feeding issues: colic, gas, and reflux AirFree vent keeps nipple full of milk, not air AirFree vent is one piece, easy to clean A range of flow rates are available for your growing baby. This set includes 0month+ Newborn nipples (Size 1) and 1month+ Slow Flow nipples (Size 2) Philips Avent is the #1 brand recommended by moms worldwide Philips Avent Anti-colic Bottle with AirFree vent Beginner Gift Set, SCD394/02 provides everything a new parent needs for safe, easy feeding. Each of the 4 BPA free Anti-colic bottles includes an AirFree vent designed to reduce most common feeding issues including colic, gas, and reflux. This set includes 2 Anti-colic 9oz bottles with AirFree vents, 2 Anti-colic 4oz bottles with AirFree vents, 1 Pacifier, Formula Dispenser, Bottle Brush, My First Transition Cup, and Soft Spout. The Formula Dispenser holds 3 pre-measured portions of milk powder and is ideal for travel. The Bottle Brush's curved brush head and molded tip cleans hard to reach areas. The My First Trainer Cup allows you to add handles to a familiar bottle and nipple and comes with a nipple and soft spout for easy training.