The Philips Avent Natural Response Baby Bottle features a Natural Response Teat that releases milk only when the baby actively drinks, allowing them to feed at their own rhythm. This design makes it easy to combine breast and bottle feeding. The teat opening is engineered to prevent milk loss, whether at home or on the go. Additionally, the anti-colic valve is designed to direct air away from the baby's tummy during feeding, helping to reduce colic and discomfort. This 3-pack of 260ml bottles is suitable for newborns and up, aged 1+ months.