Material: Food-grade silicone PP sound-emitting membrane with anti-drop design & knitted mesh (free of bisphenol A, lead and known harmful substances), non-latex product, will not cause allergic reactions to infants and children, can be used with confidence! 2. The soft silicone material can massage the gums, relieve the discomfort of teething, and help the baby's deciduous teeth grow healthily. 3. Various candy-colored teething rings can exercise babies' visual following ability. The specially designed PP sound-emitting membrane can produce a slight sound, which can attract children's attention! 4. Effectively help babies get rid of the bad habit of biting things and fingers randomly, and accompany them well through the sensitive period of oral cavity. 5. Usage method: Before and after use, it should be cleaned with warm soapy water or disinfected by boiling in water, and then dried in a well-ventilated and cool place before use.