Dr. Brown's Anti-Colic Options+ Narrow Baby Bottle 8oz/250ml with Level 1 Slow Flow Teat 3-Pack offers a clinically proven anti-colic internal vent system that reduces colic, decreases spit-up, burping, and wind. It provides vacuum-free feeding similar to breastfeeding with silicone teats for a consistent flow, allowing babies to feed at their own pace. The system helps preserve bottle milk nutrients and aids digestion for better sleep. These bottles are dishwasher safe (top rack only), compatible with electric and microwave sterilisers or boiling water, and are BPA free. The bottle adapts as your baby grows, with the vent system removable as feeding develops, eliminating the need for a different bottle.