NUK"s specially designed teats and bottles make the switch between breast and bottle-feeding easier. The teat shape ensures correct oral development and are approved by the British Dental Health Foundation. The bottle comes with Size 1 Anti-Colic Latex Teat for 0-6 month old babies. Latex teats are soft and similar to breast tissue to ease the switch between breast and bottle. The 120ml wide neck traditional glass bottle means it is easy to fill, clean and offers stability. The bottle comes with simple designs in either red, blue or yellow. The Learner Bottle is part of the NUK First Choice range which means the parts are all interchangeable with any other First Choice products. The First Choice range was developed with mums and medical experts worldwide to find the ideal feeding bottle. First Choice bottles have an extra wide neck to make it even easier to make up a feed and clean the bottle afterwards, and easy to hold. The sealing disc and screw ring guarantee leak-proof transport. They are available in plastic (BPA Free polypropylene) or glass. All NUK products are BPA (Bisphenol A) free. They are made from polypropylene plastic . Please note this type of plastic has a slightly milky appearance. Sterilise NUK bottles, teats and soothers using steam or cold water sterilisation. Microwave sterilisation may cause material damage to latex teats or soothers. Do not place NUK products in the dishwasher as this can cause material damage. For hygiene purposes and safety, replace teats and soothers after 1-2 months use.