The colorful cooling teether keys look fun and are easy to hold by little hands. They provide a gentle cooling, thanks to the PûrICE™-gel inside. It stays cool much longer than a traditional water-filled teether. Put the teether in the refrigerator, not in the freezer. The soft material of the cooling teether keys stimulates the lips and tongue, which promotes a healthy oral development. Meanwhile, the different shapes and colors encourage the motor development of your baby. Teether keys by Nûby™ are suitable for babies from 3 months on.