Nuk disney soother size 2 redgreen is suitable for babies 6 18 months old and satisfies the natural sucking desire and train the muscles of the lips tongue and jaws which play an essential role in learning to eat and speak the nuk air system ensures that air can escape through the baglet thus allowing it to stay soft and malleable minimising the risk of tooth malformation nuk teats and soothers are accredited by the british dental health foundation