Set of 6 solids for volume comparison

MACHINE TRANSLATION (not authorised yet)

5 "open" solids made of transparent plastic. 2 x cylinder (high and low), 2 x perpendiculars (including a cube), all 4 of 1 litre volume. The fifth solid is a cylinder of 0,5 litre volume. All of them can be filled with liquid or loose material in order to compare the volume and show the relation (multiple or simple fraction).