Japanese YOUCUPS Crystal Series Masturbation Cup - Normal Stimulation Type! Designed with a double-layer construction, it combines a transparent high-stretch soft gel material with a high-stimulation hard-core support structure. Experience stimulation like never before, with the soft gel clinging to you and the hardcore giving you just the right amount of stimulation! WARNING: Keep the product away from children. DO NOT expose the product to humid places, direct UV or sunlight for an extended period. Product is a reuseable after wash. DO NOT use this product with more than one person. DO NOT place any object inside the cup for use. Safety Precautions: Always clean the product before and after use. We recommend using water-based lube with your toy.