Happy Feeding Reduces Colic Spit-Up, Burping & Gas Helps Preserve Vitamins C, A + E Plus Lipids BPA Free Vacuum-Free Feeding Helps Digestion Air enters the bottle collar and routes directly through the internal vent system. The air channels through the vent tube, bypassing the milk, to the end of the bottle. The vent prevents aeration of the milk, vacuum pressure and nipple collapse. Baby feeds comfortably while milk flows freely, like breastfeeding. Helps reduce feeding problems - Our bottles are known for reducing colic, spit-up, burping and gas. Proven to help preserve bottle milk nutrients* - Vitamins C, A, and E are critical for healthy in infancy. Vacuum-free feeding helps digestion - Good digestion is essential for babies, particularly newborns. Fully-vented bottle design - Closest to breastfeeding. Internal Vent System and silicone nipple work together - Controlled flow so babies feed at their own pace. 0m +3m +6m +9m +9m + Level 1Level 2Level 3Level 4Y-Cut Choose the right nipple. Made of super-soft, high-grade silicone, each nipple level provides a different flow rate. Contents: 3 - 8 oz/240 ml Wide-Neck baby bottles. 3 - Level 1 silicone nipples. 1 - Cleaning brush. Instructions *Per a recent university study.