The Nuby IcyBite Teether can be placed in the refrigerator and once chilled, the cool surface soothes and stimulates sore gums safety. The purICE gel inside stays colder longer than water-filled teethers. The raised, offset surface assists in the eruption of teeth by gently massaging infant's gums. Nuby IcyBite Teether: •BPA free •Sized perfectly for little hands •Available in a variety of colors