This is a universal ENCLOSED spool holder that protects the filament from dust and humidity.
I used and adapted the universal spool holder from Foreverwinter (https://www.thingiverse.com/Foreverwinter).
Quick Change Universal Spool Holder (https://www.thingiverse.com/thing:1241566/files).
Thanks to Foreverwinter who supplied the Fusion 360 files witch made things very easy for me!
One M10 110mm Cap head screw (Or you can print the one included in stl).
Two M10 nuts (You can also print them from the provided stl's).
Two bearings 22mm OD 10mm ID
One Tupperware like container. I used this one available on Amazon (STERILITE Rocket Red Sterilite Plus Ultra Seal Latching Bowl, 4.7 quart https://www.amazon.ca/dp/B0042FJSLQ/ref=cm_sw_r_cp_api_i_fvtkCbEXR51W7). But if you look around you will most probably find one that fits.
As for the filament slot, something could be tried with flexible material to get a better seal and let the filament pass while keeping humidity away.
Hope you like the idea!
Varies depending on parts