... 1.100% silicone material 2.FDA&LFGB standard 3.OEM&ODM 4.good ... , soft feeling, durable and tensile of its physical characteristic,100% silicone,heat-resisting,cold-resisting.2)Function :Be used for bottles3 ... thorough cleaning.8)High quality,approved by FDA,SGS,LFGB. silicone bottle stopper/cap