Dr. Brown's 4 oz. Standard Polypropylene Bottles

Dr. Browns bottles feature a patented two-piece internal vent system that works unlike any other bottle design. As the baby feeds, air is channeled from the nipple collar through the vent system, bypassing the breastmilk or formula, to the back of the bottle. The vent system on these Dr. Brown's Natural Flow Standard Glass Bottles eliminates air bubbles in the formula or milk, which helps to reduce feeding problems like colic, spit-up, burping and gas. Instructions Wash with warm soapy water before using.

• Dr. Browns bottles feature a patented two-piece internal vent system that works unlike any other bottle design.
• As the baby feeds, air is channeled from the nipple collar through the vent system, bypassing the breastmilk or formula, to the back of the bottle.
• Air never mixes with the breastmilk or formula which minimizes oxidation and helps maintain essential nutrients like vitamins C, A and E.
• 4 oz. Standard Polypropylene Bottle with Level 1 nipple, 4 pack, INDIVIDUALLY PACKAGED