Dr Brown's Natural Flow Anti-Colic Options+ wide-neck glass baby bottle helps reduce colic, spit-up, and wind with its clinically proven internal vent system. This 5oz/150ml bottle offers vacuum-free feeding that mimics breastfeeding, preserving nutrients and aiding digestion. The orthodontic teat encourages proper latch for natural feeding, easing transitions between breast and bottle. Made from BPA-free glass, it's dishwasher and microwave safe, suitable from newborn to 12 months. Includes Level 1 teat for consistent flow rate.