Intense Stimulation with an Ultra-Strong Design Crafted with firmer elastomer material and a complementary set of internal details, this CUP delivers a tight fit and pronounced stimulation with every stroke. For those craving stronger, more satisfying sensations and intense suction, look no further. The ORIGINAL VACUUM CUP's special valve structure creates an incredible suction sensation when you cover the air hole during use. The hourglass-shaped design delivers a tight squeeze as you insert, enhancing the internal details for unrivalled stimulation. You don't need to worry about applying lotion or leakage because the Smooth Pad insertion mechanism creates an airtight seal and automatically applies the internal lotion as you insert.