How is the volume of an irregular object measured?

The volume of an irregular object is measured using displacement. This is done by filling a Eureka can with water and the Eureka can has a spout so water can flow out of the can. The irregular object is now placed in the water and the water will become displaced and flow out through the spout (Into a measuring column) The volume of water displaced is measured using a ruler and the volume of the water is the same as the volume of the object