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 No-drip nipple design helps prevent lost milk from the tip of the baby bottle, giving you peace of mind; Bottle Nipple comes in Flow 3 Anti-colic valve on the bottle is designed to reduce colic and discomfort by sending air away from your baby's tummy Baby bottle gift set with ultra air pacifiers that feature 4 large air holes in the shield to let babys skin breathe and maximize air flow to baby's sensitive skin Material composition: 80%plastic, 20%silicone