Prusa MINI+ Kit Tool Box

This toolbox is 145mm square and comes with space for the universal wrench, pliers, five hex wrenches, and USB drive, which come with the Prusa MINI+ kit. (The non-kit version comes with fewer tools.) You may also be able to tuck a few spare HARIBOs in the corners.

The box has a short lip around the edge which could accept a lid, although I have not tried making one yet.