Dr. Brown’s Natural Flow Options+ Wide-Neck Bottle Newborn Feeding Set includes; 2x150 ml & 3x270 ml Wide-Neck bottles, 2x Level 2 Teats, 2 storage caps, 3 cleaning brushes. From teat to base, the Options+ Wide-Neck Bottle makes for a comfortable feeding experience for baby and eases the transition from breast to bottle and back again. Breast-like shape is contoured for a natural bottle-feeding experience. The anti-colic vent system is clinically proven to reduce colic. May help to decrease spit-up, burping, and wind. Each teat is engineered for consistent flow, so you and baby know what to expect. Use bottle with or without the internal vent system. Dishwasher (top rack) and sterilizer safe. BPA free and 0m+.