Dr. Brown’s Natural Flow Options+ Wide-Neck Bottle. 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. The breast-like shape is correctly contoured for a more 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+.