This is my design for a configurable small parts box. I made this so I can print my own storage trays for my random collection of tiny things.

The lids have lips that keep items from shifting from tray to to the other when they're closed. They don't shap shut though. I use them inside other boxes that hold the lids shut.

You can find the OpenSCAD source files in my 3d_designs gitlab repo here:

small_parts_box.scad

Instructions can be found at the top of the file along with a few example configurations. With the OpenSCAD file, you can make boxes whatever size you want and configure the trays. You can also adjust tolerances and how thick you want the walls.