Dr. Brown's Natural Flow baby bottle is the only baby bottle that features a patented internal vent system. This vent eliminates the air bubbles and vacuum effect to allow positive-pressure feeding with no air - similar to breast-feeding.

Designed to: * Reduce colic, spit-up, burping, and gas * Prevent air bubbles from forming in milk or formula * Help reduce fluid in the ear * Prevent nipple collapse

Features: * Easy to clean and top-rack dishwasher safe * Includes a high-grade Level-One silicone nipple, patented two-piece internal vent, travel disk, cap, cleaning brush, and instructions