Created by a physician, Dr. Brown's bottles feature a patented internal vent system that eliminates the vacuum and air bubbles to help reduce colic, spit-up, burping and gas. The positive pressure design allows babies to feed comfortably, because the vent system eliminates the air bubbles and vacuum. Helps maintain vitamins C, A & E plus lipids. Easy to clean, dishwasher safe, BPA free, Includes 3 Blue 8oz standard bottles, 3 Blue 4oz Standard bottles, 2-Level Two silicone nipples, 2-Level Three silicone nipples, 1 Flexees Teether, 1 Coolees Teether, 2 Storage-Travel Caps, 1 Bottle Brush, 2 Cleaning Brushes, Instructions. A $66.55 Value.