18-litre can; 18-liter drum
A metal can or drum with a capacity of one to (approx. 18 litres), commonly used for storing oil, chemicals, or foodstuffs.
I store kerosene in an 18-litre can.
Variant using numeral 1; less common but seen in some contexts.
Compound of 一斗 (itto, 'one to', a traditional unit of volume equal to about 18 litres) and 缶 (kan, 'can').