The bamboo jar is a kind of light, economical and not so hot fire cupping. It's easy to make and available in many places. According to a prescription, it also can be boiled together with herbs, the herbs are absorbed by the bamboo cups, which in turn transfer their healing properties to the patient. This method is usually employed when external pathogens such as Cold, Damp and Wind attack the body, causing stiffness and aching, particularly in the neck and shoulders.