Another simple stackable parametric box (customizable with OpenScad). Print with supports on build plate (!!!).

Changeable parameters:
- type (open/closed, one/two compartments, high/low separator)
- width/depth/height
- height of front wall (for open variants)
- bottom thickness
- wall thickness

Pre-rendered stl files are 300x100x60mm with the front wall 20mm high, 1mm bottom & 2mm wall thickness.
As you can see this is a very good final resting place for filament that needs to go.