Box for filament.
It's modified tool box
https://www.prusaprinters.org/prints/39729-tool-box-parametric.

The groove for the seal is provided directly for filament A82-85 1.75 mm, but maybe it is better with an elastic band 2 mm. In fact, even the softest filaments are not as soft as an elastic band.

It need:
M3x40mm for the latch and the hinge.
M4x8mm for spool holder.

It may need to drill the hinge of the lid with a 3mm drill bit, it must rotate freely around the axis.

The box is parametric and can be any size, including the thickness of the box and the ribs.

205.210.100mm are internal dimensions.
(205 internal is 214mm outside dimension)

Gcode files are only for Prusa MK3/S with modified printer setings(bed size Y= 215mm and extruder position Y +3mm) to be able to print 215mm on the Y axis.

I haven't printed and tested the desk stand but it should be ok.

I added a modified version with silica clips and the filament the output does not need support.
Silica clips are also available as a separate part that can be glued with glue to already printed boxes.