For Illuminati or Egyptian themed parties, duh. But the openscad file can be modified to make ice cubes in any shape

This should probably be printed upside-down.

The openscad file lets you use any shape for your ice cubes(using import()). Make sure that the object is flat on top of the xy plane at the orgin, and adjust the icecube_size and icecubes appropriately.

I'f your 3D printer is not food safe, then the ice cubes are for decoration only. Or you can try using plastic wrap or something.