Philips Avent Natural newborn flow nipples are designed to help babies combine breast and bottle feeding. The nipple's wide shape is similar to the shape of a breast, and its soft, rounded nipple encourages natural latch on. A unique petal design increases flexibility and helps prevent nipple collapse while your baby feeds. Also, the advanced, twin anti-colic valves keep air in the bottle and out of babies' tummies, making feeding more comfortable. The nipples are made of soft, durable silicone. The newborn flow nipple has a slower flow rate that is ideal for newborns. The Philips Avent Advantage We know the tiny details can make a difference to you and your baby. For 30 years, we’ve been listening, learning and innovating so that we can provide the best quality products designed with you and your baby’s needs in mind. That’s why more moms recommend Philips Avent worldwide. Philips AVENT Feeding Breastfeeding for Children product range includes breastfeeding, bottle feeding, toddler feeding, baby monitors, and newborn gifts. They are designed to be interchangeable and grow with your baby through multiple stages of development.