Product application scope: Sealing of plastic and glass bottles made of various materials such as cosmetics, daily chemical products, medicine, honey, food, beverages, alcohol, pesticides, engine oil, chemicals, etc. Usage method: Insert the applicable aluminum foil film gasket (depending on the size of the inner diameter of the bottle cap and the distance gap between the bottom of the bottle cap and the bottle mouth) into the bottle cap, then unscrew the bottle body and tightly seal it.