Dr. Brown’s Natural Flow Standard Glass Bottles, 4 Ounce, 2-Count

Reduces colic, spit-up, burping, and gas
Less oxidation helps maintain vitamins C, A and E
Vacuum-free feeding like breastfeeding Dr. Brown's bottle features a patented two-piece internal vent system that works unlike any other bottle design. The vent system fully vents our bottle for vacuum free feeding, which we call positive-pressure flow, similar to breastfeeding. As the baby feeds, air is channeled from the nipple collar through the vent system, bypassing the breast milk or formula, to the back of the bottl More »