Even when using aroma oil for massage, experts recommend adjusting the concentration of essential oil within 1 to 3%. One or two drops can be considered as nothing, but it can be very dangerous depending on the type of essential oil, especially the strong acidic ingredients. There are cases of chemical burns after ignoring them and handling them roughly, and there are experiences that depending on the type, plastic is also rusty. Therefore, unlike sweet scents, there are many types that are prohibited to use on infants and toddlers. It is not equipped with a safety lid to prevent infants and toddlers from opening it recklessly. Depending on the ingredients, it can act as a deadly poison to pets such as dogs and cats.