Replacement teat made of elastic material, tasteless and odorless, easy to replace, insert and remove from the bottle. First Choice helps small children to drink, helps them learn to drink alone thanks to the system NUK Anti-Colic Air, prevents swallowing air and the onset of colic, is resistant to high temperatures and, of course, is free from harmful substances, anti-drip - ideal for use outside the home, suitable for children from 6 to 18 months. Material: