The U.S. military adopted the five gallon metal jerry can early in World War II. It has been used for gas, water and other liquids as a key component of military logistics, becoming a widely recognized basic item of military equipment. It has evolved from its German origins as a steel container to the modern plastic jerry cans in military use by the U.S. by NATO and many other countries. Civilian copies, by the millions, as well as surplus military jerry cans are found in every part of world.
The 5 gallon military gas can -- often called a "jeep can", "Gerry Can", "Jerry Can", "army gas can" or "Blitz Can" -- is one of the most ubiquitous items of military hardware in the world. Jerry cans are not only ever-present during military operations, but you will see them regularly in civilian life, mounted on a tow truck, in someone's garage, or on the back of an off-road rig. This has been the case since the jerry can first appeared early in World War II and remains so today