ALL CREDIT GOES TO 1sPiRe for his awesome boxes customizer (Drawer Boxes Customizer, https://www.thingiverse.com/thing:4638621).

I really needed a stackable version of the assortment boxes, and I loved how customizable 1sPiRe ones are, sadly they weren't that stackable with the sticker lip. I have never used OpenSCAD before and had a fun time learning it.

I added Stackable parameter to Boxes Parameters to make the boxes stackable, should work with every box size and height I tried.

Stacked boxes are a little shorter than the normal 2x height box. The top box overlaps 2 mm with the bottom one, if you take that into consideration, you could make half size boxes aswell. For my 40mm height box, I printed the half size 21mm each, to account for the 2mm overlap.

Let me know in the comments if there are any problems with the stacking.

Use whatever settings is the quickest and takes the least amount of filament or you will be printing for weeks, I used 2 perimeters 0% infill, and 0.3mm layer height, it is a bit ugly, but functional.