Brand Dr. Brown's Color 3 Count Material free BPA Free Item Weight 2 Pounds Bottle Nipple Type Wide-Neck Nipple About this item. The New natural nipple is engineered for consistent flow, so you and baby know what to expect Breast-like shape is correctly contoured for a proper latch and a more natural bottle feeding experience Anti-colic vent system is clinically proven to reduce symptoms like spit-up, burping and gas Shown to better preserve nutrients in breast milk and formula; Aids indigestion for good night’s sleep Offers flow rate that supports breastfeeding; Use a bottle with or without internal vent system Minimum 0 Months, Maximum-12 Months