Philips Avent Anti-colic Bottle (1M+) - 9oz/260ml (Double Pack)Philips Avent Natural Response 260ml Bottles The Philips Avent Natural Response 260ml Bottles come in a pack of 2 wide neck 9oz 260ml bottles, each equipped with Natural Response Nipples. These nipples release milk only when your baby actively drinks, allowing them to drink, swallow, and breathe naturally, similar to breastfeeding. This design makes it easy to combine breast and bottle feeding. The pack includes Flow 3 Nipples, suitable for babies 1