In folk medicine, it is believed that when treating with herbs, it is better to use infusions rather than individual plants. In Chinese herbal medicine, for example, each collection can include up to 250 types of herbs! According to popular recommendations, hot infusions are prepared in a thermos. The prescribed dose of dry raw materials, usually 2–4 tablespoons, is poured into a 0.5 or 0.7 liter thermos in the evening, the thermos is filled to the top with boiling water and closed.