The Philips AVENT natural teat helps make bottle feeding more natural for baby and parent. The natural latch on makes it easy to combine breast and bottle feeding for baby. It's a unique valve with an anti-colic system designed to draw air out of baby's tummy instead of into it, thus reducing colic and fussing. The teat has a soft, rounded shape and a flexible spiral design, mimicking the natural movement and softness of a mother's breast. Made from BPA-free material for peace of mind. This pack contains two fast flow teats.