Philips Avent Natural Response Nipple 0m 2 packs of 2, 4 total

Baby controls the pace of milk, just like breastfeeding • Designed with a unique opening and tip which only releases milk when baby actively drinks • No-drip nipple design helps prevent lost milk from the tip, giving you peace of mind • Anti-colic valve is designed to reduce colic and discomfort by sending air away from your baby's tummy