Your options have never been better! From nipple to base, the Dr. Brown?s? Options+? Wide-Neck Glass Bottle offers a more natural bottle-feeding experience and eases the transition from breast to bottle and back again. - Clinically proven to reduce colic - Decreases spit-up, burping, and gas - Shown to better preserve nutrients in breast milk and formula - Aids in digestion for a good night?s sleep - Offers a flow rate that supports breastfeeding - BPA free, dishwasher (top rack) and sterilizer safe