Cupping has always been known as a pain-relieving or blood circulation-enhancing therapy, which is also known as a healing method that strengthens the immune system.^ Cupping gives your skin a pleasant vacuum massage. Cupping helps in the fight against many diseases, such as^ Flu, cold, heat stroke, bronchial asthma, acute bronchitis, chronic tonsillitis, chronic pharyngitis, hypertension, angina pectoris, arrhythmia, diabetes, gastritis, oral cavity ulcer, stool constipation, nasal inflammation, ringing in the ears, cervical vertebra syndrome, shoulder-arm syndrome^ Chronic Lumbar Muscle Strain, Rheumatoid Arthritis, Hives, Pakinson's Syndrome, Intestinal Absorption Disorder, Constipation and many more helps ^ The glasses are made of plastic glass.