Dr. Brown’s Natural Flow® Anti-Colic Options+™ Wide-Neck Baby Bottle, with Level 1 Slow Flow Nipple Your options have never been better than  Dr. Brown’s Natural Flow® Anti-Colic Options+™ Wide-Neck Baby Bottle. The anti-colic internal vent system is clinically proven to reduce colic. Dr. Brown’s® bottles provide a more comfortable feeding experience for baby by decreasing spit-up, burping and gas. Anti-Colic vent system is clinically proven to reduce colic. Decreases spit-up, burping and gasBreast-like nipple shape encourages a proper latch and provides a consistent flow so babies feed at their own paceComes with Level 1 Slow Flow Nipple, 0m+Breast-like nipple for more natural feedingProven to help preserve botte milk nutrientsVacuum-free feeding helps digestionFully-vented bottle design, closest to breastfeedingInternal Vent System and silicone nipple work together. Controlled flow so babies feed at their own pace.Use with or without vent CONTENTS1 - 9ox/270ml WIDE-NECK baby bottle1 - Level 1 Silicone Nipple1 - Cleaning BrushInstructions