Doc Johnson presents the world's first premium vibrating glass. Designed by true artisans in vibrant jewel-like pallets, Reflections Hope Glass Vibrator is waterproof, phthalate free, completely hygienic and easy to clean. And because they're glass, they transfer an incredible vibration, at any of their three varying speeds. Warm them up or cool them down with hot or cold water to experience an additional boost of euphoria. Takes two AA batteries, sold separately.