Give your baby the natural feeling of breastfeeding in a bottle with the Philips Avent SCF652/27 BPA-Free Natural Slow Flow Nipple, 2-pk. Made of soft, durable silicone with a petal design that prevents it from collapsing, these slow-flow nipples are perfect for little mouths. Each nipple has twin anti-colic valves, which vent air into the bottle and not into your little ones tummy, helping your babe rest peacefully. Mix and match this set with any Avent Natural bottle. Ages 1 mo. and up. Dishwasher safe.