Designed for use with the vital baby® NURTURE™ silicone feed assist feeding bottles, the vital baby® NURTURE™ silicone feed assist teats have advanced triple anti-colic valves to help reduce air intake.The classic shaped wide neck teat is only compatible with vital baby® NURTURE™ silicone feed assist feeding bottles which offering full control of milk flow for baby. The silicone teat is soft and kind on baby’s skin.For hygiene reasons, we recommend that the teats should be replaced at regular intervals. Check your teat each time you are about to use the bottle, this is especially important when your baby is developing teeth. Replace your teat when the first signs of damage appear.