These containers are used specifically for the movement of liquid cargo. Tank containers are built with a cylindrical tank encased in a rectangular steel frame that fits the dimensions of standard 20-foot shipping containers. The tanks are made from stainless steel or other materials suitable for the liquid being transported, ensuring compatibility and resistance to corrosion. Tank containers are used to transport a wide range of liquid cargoes, including chemicals, food-grade liquids (like oils and spirits), gases (in liquefied form), and other hazardous and non-hazardous liquids.