Your options have never been better with Dr. Browns Natural Flow Anti-Colic Options+ Narrow Baby Bottle. The anti-colic internal vent system is clinically proven to reduce colic. Dr. Brown bottles provide a more comfortable feeding experience for baby by decreasing spit-up, burping and wind. This vacuum-free feeding is closest to breastfeeding and Dr. Browns silicone teats provide a consistent flow so baby can feed at their own pace. The breast-like teat shape encourages a proper latch for a more natural bottle feeding experience and eases the transition from breast to bottle and back again. Dr. Browns vent system is proven to help preserve bottle milk nutrients and aids in digestion for a better nights sleep. The silicone teat, together with the internal vent system, offer a reliable and trusted bottle feeding experience that makes Dr.