Dr. Brown’s Natural Flow® Y-Cut Nipple is the next step when baby is ready for thicker liquids. Dr. Brown’s® Y-Cut Nipple, together with the Anti-Colic internal vent system, is clinically proven to reduce colic. Dr. Brown’s® bottle and nipple provide a more comfortable feeding experience for baby by decreasing spit-up, burping and gas. This vacuum-free feeding is closest to breastfeeding and Dr. Brown’s® Y-Cut Nipples provide a consistent flow so baby can feed at their own pace. The breast-like nipple shape encourages a proper latch for a more natural bottle feeding experience and eases the transition from breast to bottle and back again. The Y-Cut Nipple and Anti-Colic vent system is proven to help preserve bottle milk nutrients and aid in digestion for a better night’s sleep. Made of super-soft, 100% silicone, the Y-Cut Nipple fits all Dr. Brown’s® Options+™ wide-neck bottles. Safe for use in dishwasher (top rack only), electric and microwave sterilizers or boiling water. BPA free.