The colorful teething keys look cute and are easy for little hands to hold. The keys are filled with non-toxic Puricetm gel for a cooling effect, which stays cold longer than traditional water-filled teething rings. The teething keys stimulate the lips and tongue, supporting oral development. Multiple teething surfaces help with the emergence of new teeth and relieve teething pain. They are perfect for nibbling and alleviating teething discomfort. The soft materials of the teething keys promote healthy oral development. At the same time, the various shapes, textures, and colors stimulate your baby's motor development. The Nûby teething keys are suitable for babies from 3 months old. (LxWxH): 6x9x12.5 cm.