With only two parts, the Born Free breeze glass bottle is the easiest to clean bottle system that both you and your baby will love. The anti-colic design ActiveFlow vent puts baby in flow-control, and the ?Just like Mom? nipple makes it easy to alternate between breast and bottle feeding. Breeze BPA-free glass bottles are made from ThermaSafe glass and can safely go from freezer to boiling water. </br>Features: </br>Easiest to clean & assemble - only 2 pieces. BPA-free ThermaSafe glass can go from freezer to boiling water. Anti-colic design with ActiveFlow vent included in nipple. Includes level 2 medium flow nipple 1m+ and cap for on-the-go convenience. "Just like Mom" nipple makes alternating between breast and bottle easy. Easy to hold for mom, dad, and baby.