The black PLA Plastic Cube Cartridge from 3D Systems is a compostable cartridge that is compatible with the 2nd generation Cube printer. Each cartridge contains enough material to make about 35 models per cartridge. Switching the cartridge out is a breeze - it snaps right in. The Cube also notifies you of how much material is left in the cartridge and doesn't let you start to print a creation if you don't have enough material to finish it, avoiding waste. Up to 13 to 15 cell phone cases (or creations of similar size) can be printed from a single cartridge. An average smartphone case takes about 2 hours to print. Each layer on the printed creation is 200 microns, or 0.008" (0.2 mm) thick.
You can use one color at a time while printing on a Cube. If you want your creation to be multicolored, you can either print it in separate pieces and attach them together later, or they can be printed on a different machine with an optional Cloud Printing service. The cartridges cannot be swapped in the middle of a print.