Somewhat parametric box design (parameters are documented in the scad file). Not checked in Thingiverse customizer. It works for my purposes now, will fix bugs whenever I find any.

One outer edge (long or short) can be beveled. Outer dimensions, bottom thickness, wall strength & radii for the inner bevels are parametric. The box can be split in two or three parts with a puzzle-like connector (end pieces are same length, length of middle piece can be chosen).

The current use case is organizing our huge kitchen drawer. Designed to be as strong as possible with thin walls & bottom to save print time&filament, but when split at least 2mm bottom thickness is advisable. I plan to just glue the pieces together with a piece of tape on the underside.