Glield 12pcs Cup Silicone Cupping Set for Chinese Cupping and Massage Therapy BG02 1. Pure physical therapy, easy to be handled and safe to be used for self-treatment at home. 2. The product is composed of 12 silicon cups 3. Keep it clean, avoid to be scratched. 4. Use the disinfectant or alcohol cotton cloth to clean, it can not be boiled or heated in water 5. Cupping has also been found to affect the body up to four inches into the tissues, causing tissues to release toxins, activate the lymphatic system, clear colon blockages, help activate and clear the veins, arteries and capillaries, activate the skin, clear stretch marks and improve varicose veins.