Dr Brown\'s Options+ Anti-Colic 270ml Glass Bottle Twin Pack helps to reduce colic due to Dr Brown\'s unique 100% vacuum-free vent system. The bottle can be used with or without the removable internal vent system, transforming it into a teat-vented bottle for more convenience. Suitable for use from birth. With over 20 years\' experience helping parents combat colic, Dr Brown\'s Options+ Anti-Colic 270ml Glass Bottle with Level 1 Teat Twin Pack is clinically proven to reduce windy colic due to Dr Brown\'s unique 100% vacuum-free vent system. Dr Brown\'s Options+ bottles offer an easy and comfortable way to feed your little-one, adapting to their needs as they grow. With Dr Brown\'s Options+ unique design, the bottle can be used with or without the removable internal vent system, transforming it into a teat-vented bottle for more convenience. Dr Brown\'s Options+ bottles can be used from birth. The unique internal green vent system continues to create 100% vacuum free feeding, which is clinically proven to help reduce wind related colic. This is what makes Dr Brown\'s the number one choice of UK Health Professionals for the relief of colicky symptoms. The breast-like teat shape is correctly contoured for a proper latch and a more natural bottle-feeding. Each teat is specially engineered to offer the same consistent natural flow, so you and baby know what to expect in every feed. Key features of Dr Brown\'s Options+ Anti-Colic 270ml Glass Bottle Twin Pack Can be used with or without the removable internal vent system Breast-like teat shape 2 x Anti-Colic 270ml Sized Glass Bottles BPA free Easy to use