- a narrow, flat-sided, 5-gallon (19-liter) container for fluids, as fuel.
- a can with a capacity of 4½ imperial gallons (5.4 U.S. gallons or 20.4 liters).
- a flat-sided can with a capacity of between 4.5 and 5 gallons used for storing or transporting liquids, esp motor fuel: originally a German design adopted by the British Army during World War II
