Dr. Brown's Baby Bottle, 4 Ounce, 3-Count - Pink is designed to reduce colic, spit-up, burping, and gas. The bottle helps preserve essential vitamins such as C, A, and E, which are crucial for infant health. The vacuum-free feeding system aids digestion, making it ideal for newborns. The fully-vented bottle design closely mimics breastfeeding, and the internal vent system along with the silicone nipple ensures a controlled flow, allowing babies to feed at their own pace. The bottles are made from high-grade silicone and are phthalates-free, ensuring safety for your baby.