Evenflo Vented + Angled Bottles and Proflo Vented Nipples provide a complete line of feeding solutions for your baby's changing needs. Where form meets function, these bottles are created with both baby and you in mind. The Vented + Angled Bottle's shape promotes semi-upright feeding, which can help reduce earaches, reflux, and gas. Evenflo paired this unique shaped bottle with their patented Proflo Venting Technology. Expertly designed for easy assembly and leak-free feeding, the simple, one-piece integrated nipple and vent system means no extra parts to clean or lose. These soft silicone nipples rapidly vent, directing air bubbles into the bottle, not baby's tummy, which significantly reduces gas, colic, and fussiness.