Steel Barrels
Steel barrels are a type of closed-top drum used to store and transport liquids. They may be made and in some cases certified to carry flammable, radioactive, and otherwise hazardous waste materials.
The United Nations, U.S. Department of Transportations, and U.S. military all have particular specifications for different types of steel barrels.
In addition to hazardous materials, steel barrels may be used to carry any number of other liquids. For example, stainless steel barrels may be used in place of wood to hold wine in various stages of fermentation and maturation.