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