Modular interlocking storage boxes

I've been unhappy with my options for inexpensive storage for small items like m3 bolts, nuts, and washers, so I decided to design my own.  When printed well, these boxes easily fold and snap together while providing adequate strength at the joints and lid snap.  Additional box sizes can be easily generated from the OpenSCAD file, although the print-flat nature of these boxes will cause you to hit the limits of your print bed size quicker than might be expected.