Dr. Brown's Natural Flow Options+ Wide-Neck Glass Baby Bottle features an innovative anti-colic vent system and breast-like nipple shape. This 5 oz/150 mL glass bottle is designed to reduce feeding problems while preserving nutrients in breast milk and formula. Key features: • Made of durable, temperature-resistant glass • Anti-colic internal vent system • Wide-neck design for easy cleaning • Breast-like nipple shape for natural latch • Removable vent system for feeding flexibility • Dishwasher and sterilizer safe • BPA free The bottle includes a removable anti-colic vent system that can be used based on baby's feeding preferences. The wide-neck design makes cleaning easier, while the glass construction offers a premium, long-lasting alternative to plastic bottles. The bottle is suitable from birth (0M+) and comes with one 5 oz/150 mL glass bottle. The breast-like nipple promotes proper latch and helps ease transitions between breast and bottle feeding.