A salvage drum is a big, strong container that is used to store dangerous or hazardous materials. It looks kind of like a really big trash can, but it's made out of really tough stuff so that it won't break if something dangerous is inside. The drum has to be specially designed so that it can hold things like chemicals, oils, or other things that are harmful to people or the environment. That way, if there's ever a spill or leak, the drum will keep the dangerous material inside so that it doesn't hurt anyone or anything else. Salve drums are really important for keeping people and the planet safe when dealing with dangerous materials.