A container used to ship liquid cargo such as alcohol, oil, liquid food, chemicals, etc. Mainly composed of liquid tank and frame. The tank is oval or approximately spherical and has a two-layer structure. The inner wall is made of stainless steel; or it is made of other rigid materials, but a layer of epoxy resin is applied to prevent corrosion of liquid cargo. The outer wall is made of insulating material. Generally, the top of the tank has a round loading port, and the bottom of the tank has a discharge valve. There are several types of high-pressure liquid tanks, low-pressure liquid tanks, thermal liquid tanks, and liquid tanks with heating devices. The frame is made of high-strength steel and the tank is placed in the middle of the frame. The handling, loading, unloading and storage of tank containers require special places and special fire safety equipment.

　　There is a corner bearing frame around the tank for protection and lifting. The outer frame size of the tank is exactly the same as the size of the international standard 20 container (length 20 feet, width: 8 feet, height: 8 feet 6 inches). Can be used for road, rail and water transportation. Loads up to 14300 to 31,000 liters (or even larger) of fluid cargo.