Barrel shaped cans (also known as barrel shaped cans or jerichon cans) are solid liquid containers made of pressed steel. Designed in Germany in the 1930s for military use, it can hold 20 liters (4.4 gallons / gallon; 5.3 US gallons / gallon) of fuel. The development of gasoline barrels is a major improvement of early design, which requires the use of tools and funnels. Today, similar containers are designed for fuel and water, some of which are also made of plastic. These designs are often modeled after the original steel design, still known as oil drums.

The use of the tank has exceeded the original intended use for transporting fuel. Nowadays, cans are used in their colors, and occasionally labels are printed on the container itself. This is to prevent contamination of the contents of the tank by mixing different fuels or by mixing fuel with water.

The history of the petrol tank is noteworthy because during the Second World War the Allied forces reverse engineered the German design, followed by a few modifications [to be clarified]. The name of the toilet refers to its German origin. Jerry is a German wartime language.