A set of Stackable BOX components I found most useful. Everything is redrawn from scratch.

Included STLs:

+ regular box + regular box with divider + half height box, properly edited (not just a scaled down version of the regular size + half height box with divider + tray + tray divided to half + tray divided into 4 + tray divided into 6

One box fits exactly 4 trays, I tend to use half height boxes with 2 trays for really small parts.

Everything is printable without supports, 0.2 - 0.3 mm layer height is recommended, with 0.4 mm nozzle.

I opted to redraw everything as the original design had issues I realised when I imported the STL and tried to edit it - it had inaccuracies, non perfectly parallel faces, and minor glitches that made much more difficult to add the dividers that I needed than it should be. It's still 100% compatible with the original one, and stacks nicely with those as well.

Update:

Refined trays to make them fit into boxes more easily.

Enjoy!