What is the oldest cupping made of?

Cupping was called the claw method in ancient China. It can be heard from this name that the commonly used tools are animal horns (animal horns) such as yellow horns, and some use cups, cans or lights to cupping. These are the original methods of cupping. In traditional Chinese medicine, the most common is the ordinary bamboo tube, or the bamboo tube boiled with Chinese herbal medicine.

Although China's porcelain-making technology is superb, porcelain cupping is still rare, because Chinese medicine believes that porcelain cupping has no "medicinal properties" and is heavy and brittle, which is not easy to carry, while bamboo cans can be used, although they have weak suction and poor sealing.

Please adopt!