Philips Avent Natural Bottles with Natural Response Nipple - 11oz, 4pk New Amazon Overstock! Features: Included 4 Natural Bottles 11oz/330ml with Nipples 3m+ (Flow 4), BPA Free 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 breast Our 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 milk No-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. I ship fast!