Hazardous waste container designed to contain exhausted oils made of vertical double-walled polyethylene, with a variable capacity: from 290 to 1000 litres. They have a smooth, thick surface, designed to adequately resist spills. The containers for used oil have provisions for loading, unloading and total emptying; they are equipped with an upper inspection opening and are suitable for containing oil. In addition, the oil tank has a level indicator for measuring the liquid inside. The oil containers are available in various sizes, including accessories, with variable diameter and height depending on their capacity.