Answer:
Liters, not an SI unit, but is well related to measurement of liquids and very commonly used.
Explanation:
Volume is commonly referred to amount of liquids in the three dimension space which is occupied by that particular liquid. The SI units for volume is either cubic meter for higher volume or cubic centimeter for lower volume. For measurement of solid volume, the above mentioned units are used. Whereas liquids are commonly measured in the form of liters or milliliters, where One liter corresponds to One thousand cubic centimeters. Liters does not belongs to SI unit for measurement.
