Complete Tummy Comfort , Unique Anti-Colic Bottom Vent: Fewer air bubbles means a happier tummy for baby! The anti-colic bottom vents keep air at the back of the bottle. As baby feeds, virtually no air mixes with the milk and gets into baby's tummy. , Angled Design Helps Prevent Ear Infections: Our angled baby bottle design promotes the semi-upright feeding position, recommended by pediatricians to help prevent ear infections. , Easy Switching Between Breast and Bottle Feeding: The Most Like Mom NaturaLatch Nipple mimics the breast to help baby latch on naturally and promotes easy switching between breast and bottle feeding.