The IcyBite Teether ring by Nuby provides a safely textured surface for your baby to bite and teethe on during their teething periods. It has been engineered with raised, offset surfaces that assist in the eruption of teeth by gently massaging infant’s gums. This Nuby teether, filled with non-toxic gel, will remain soft to safely soothe baby’s sore gums. PurICE stays colder longer than water-filled teethers. Cool only in a domestic refrigerator. BPA free.