Philips AVENT Natural Baby Bottle with Natural Response Nipple, Clear, 9oz (260 ml), Pack of 2 bottles . Natural baby bottle with Natural Response nipple: Baby controls the pace, just like breastfeeding Designed with a unique opening and tip which only releases milk when baby actively drinks; When pausing to swallow and breathe no milk flows from the bottle, just like at the breastOur baby bottles make it easy to combine breast and bottle feeding with a wide breast-shaped nipple that has a soft feel that mimics the shape and feel of a breast and baby can control the flow of milkNo-drip nipple design helps prevent lost milk from the tip of the baby bottle, giving you peace of mind; Anti-colic valve is designed to reduce colic and discomfort by sending air away from your baby's tummy