Happy Feeding Use With or Without Vent! Reduces Colic, Split-up, Burping & Gas Vent System - Designed to Grow with Baby! BPA Free Helps reduce feeding problems: Our bottles are known for reducing colic, split-up, burping and gas Proven to help preserve bottle milk nutrients*: Vitamins C, A, and E are critical for health 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 *Per a recent university study. Internal Vent System 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. We recommend using the vent system to experience all the health benefits of our bottle Helps reduce feeding problems Helps preserve vitamins Helps digestion Vent and nipple create vacuum-free feeding Some moms and dads find removing the vent is convenient options as their baby's feeding becomes more developed Provides a feeding experience similar to most nipple-vented bottles Nipple venting creates a paced flow Contents 1 - 9 oz/270 ml Wide-Neck baby bottle 1- Level 1 silicone nipple Instructions