The original model from @sraj had these both sizes of boxes, but the biggest one was presented only with internal dividers. I needed it without the divider, so I needed to remix it for myself.

Boxes are simple, versatile and perfectly stackable.
As total wall width is 0.8 mm, with 0.4 nozzle the box will be built with 2 walls, employing a nice mechanical resistance for its size.