Demonstrate the relation of length, area and volume with the use of this clear, acrylic liter cube. A cm grid on the bottom, along with capacity markings on the sides, illustrates the concept of volume as counting cubes and that volume = height x base area. The cube can be used to relate volume and mass units. Furthermore, the large top opening makes it convenient for activities measuring volume or mass of solid objects by displacement of water. Where can I get a Liter Cube? MetricPioneer.com of course!