Dr. Brown's Standard Glass Bottle, 120 ml. Set includes: 1 x glass bottle, 120 ml, narrow neck; 1 x nipple stage 1, 0 m+; 1 x two-part ventilation system; 1 x nipple cover; 1 x ventilation system cleaner. Reduces colic and prevents the formation of air bubbles in food. It is medically proven to reduce the risk of ear infections. The unique pressure regulation system ensures that the baby is fed in the most natural way. The patented ventilation system allows you to feed your baby with the Dr. Brown's bottle with or without the ventilation system, depending on the baby's needs, preferences, or age. It is the first bottle in the world that allows parents to choose a feeding method that is more meaningful and acceptable for their child.