While there are a variety of cup methods used today, the most common are fire cupping, silicone cupping & plastic cupping with manual suctions. Fire cupping is the most widely used method and uses glass cups. To achieve the suction on the skin, a therapist will soak a cotton ball in alcohol, lite it to produce a large flame and then place it inside the cup to remove all the oxygen from inside the cup. This cup is then placed on the skin to create a natural vacuum. The other cups mentioned, silicone & plastic, can be used with a manual suction to achieve the same result. This is a great alternative for patients uncomfortable with the fire cupping method.