1) Excellent flexibility 2) easy to clean and store, unbreakable 3) any color, designs are welcome. 4) certififed: SGS, RO Features: (1) Food grade silicone material, colorless, odorless, nontoxic (2) Certiciate with ROHS, SGS standard (3) Soft silicone materials easy for baby holding (4) Massage babies' gum without hurting their gum (5) Unbreakable design for outdoor use. Caution: (1) Away from ...