3D Systems' Cube 3 offers simple 3D printing in two colors at once. Quality varies, though, and the print material is unusually expensive.

It's not the first attempt at make 3D-printing a bit greener, but with some star power and the clout of 3D Systems behind it, the Ekocycle Cube definitely looks to be the highest-profile one to date.

3D Systems. LAS VEGAS--With an updated Cube 3D printer, announced this morning, 3D Systems has demonstrated its commitment to improving the ease-of-use for consumer 3D printing.