Nuby's Icy Bite Keys Teether has multiple teething surfaces to help relieve the discomfort of sore and tender gums. They are easy for little hands to hold and uses PureIce Gel, which stays cooler for longer compared to water filled teethers.  Place in the fridge (only) for cooling the gel.Encourages oral motor skills, helping the development of lips, tongue, jaw and the hard and soft palates.  The movement of which are very important in speech development, safe swallowing and consuming various textures.Suitable for ages 3months+