jerry can
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A robust rectangular container for fluids such as fuel and water. The name refers to its German origins, from the wartime slang "Jerry" for Germans. Recognizable by the cross-shaped indentations on the sides, which improve structural integrity and allow greater surface area for thermal expansion.
The original German design had a 20 liter (approx. 5 gal) capacity and was made from pressed steel. Modern versions are also made in plastic. To prevent contamination (mixing different fuels or mixing fuel with water), color coding or imprinted labels are sometimes used.
Apply this tag only to containers of comparable size and capacity, and bearing the characteristic indentations on the sides. For other (e.g. smaller) containers for gasoline, try gas can.