Fully stackable boxes (small, medium, large)

Stackable storage boxes with honeycomb profile to save material.

Note that I created 2 different series, which vary in how they much they stack on top of each other and if smaller sized boxes can fit in a larger box. Below you find the differences and the links to the right series.

__First series: Stackable boxes, box-in-box (small, medium & large)__ :
* Stackable: yes, but only boxes that are the same size
* Box in box: yes, 2 small boxes fit in one medium box, 2 medium boxes fit in one large box
* Follow this link: https://www.thingiverse.com/thing:6776791

__Second series: *this model represents this series* - Fully stackable boxes (small, medium & large)__ :
* Stackable: yes, same size on same size, 2 medium on one large, 2 small on one medium. See pictures.
* Box in box: no

Included in this model are 3 sizes of storage boxes:
- __Large__: 250 mm length x 250 mm width x 125 mm height, 2.5 mm wall thickness and 335 grams filament usage
- __Medium__: 250 mm leng