NUK Disney Soother Size 1 Red/ Green is suitable for babies 6-18 months old & satisfies the natural sucking desire & train the muscles of the lips, tongue & jaws which play an essential role in learning to eat & speak. The NUK air system ensures that air can escape through the baglet, thus allowing it to stay soft & malleable, minimising the risk of tooth malformation. NUK teats & soothers are accredited by the British Dental Health Foundation.