Several tiny openings modelled on a mother's breast give an optimal, smooth and natural flow Wide, flexible lip rest with extra-soft teat tip similar to a mother's nipple Innovative anti-colic vent helps prevent air being swallowed.

• For children aged 0-6 months, S (3 tiny openings for Breast Milk, Water, Formula).

• M comes in 0-6 month & 6-18 month (6 tiny openings for Breast Milk, Water, Formula).

• For children aged 6-18 months, L (9 tiny openings for Thicker Liquids).

• Fits all NUK Nature Sense Baby Bottles, BPA-free.