Makes transitioning easy when combining breastfeeding and bottle feeding;Soft touch and shape of nipples best simulates natural breastfeeding;Large diameter base and nipple length allows baby to latch properly;Nipples are baked to strengthen the silicone and to prevent nipple collapse;BPA, PVC and phthalate free;The nipple's unique shape allows you to better combine breast and bottle feeding and the base and nipple length assist your baby in properly latching and suckling;Nipple fits perfectly on all Joovy Boob Baby Bottles and allow an easy flow of liquid during feeding;Made of silicone, nipples are also baked to give more strength and durability and prevent nipple collapse while remaining soft;Stage 3 is fast flow for age 6 plus months; 2 Count;Ninety day manufacturer's warranty