Fully stackable box. 

Prepared few boxes and can provide print profiles for more if needed.

The boxes in the same dimension can be fully stackable, and you can control the material usage and anything else.
The fully parametric options available here:
 

[https://cad.onshape.com/documents/b96a8804c3a7cb62e62d3533/w/7a908b2e0f49bb1733e8d35f/e/51f91835de0ec21be62f171e?renderMode=0&rightPanel=variableTablePanel&uiState=67c4e9eb8c183f13bc16bed8](https://cad.onshape.com/documents/b96a8804c3a7cb62e62d3533/w/7a908b2e0f49bb1733e8d35f/e/51f91835de0ec21be62f171e?renderMode=0&rightPanel=variableTablePanel&uiState=67c4e9eb8c183f13bc16bed8)

On request, I can provide print profiles for any version wanted.