Stackable box with label (parameterized, FreeCAD)

Features:

* Thin walls (0.9mm, 2 perimeter)
* Place for label
* Stackable
* Change size in FreeCAD model

FreeCAD version used: 0.20-27319 (weekly build).

Good results achieved with 0.3mm layer height.

Sizes (l/w/h):

* 100x50x25
* 100x100x50
* 100x50x50
* 50x50x50