A filament container system, for airtight storage with a spool holder, for a smooth rotation of the filament spool. 

The spool holder I designed is suitable for most spools, but some are too wide, so I recommend using the spool holder from @Freddy_52009 from his project “Filament Dry Container”: https://www.printables.com/de/model/415050-filament-dry-container

If you don't want to feed the filment out of the lid, but from the front of the container, i recommend the ptfe adapter from @Gabe_233641, i have installed the adapter at the 20oz mark: https://www.printables.com/de/model/247524-drybox-ptfe-fitting-adapter-both-m10-m6

The "Holder_In" is inserted into the cut-out in the lid, it can also be used as a template for drilling the holes.

You can either connect the "Holder_Out" to the "Holder_In" with screws and nuts through the lid, or you can press heat-threaded inserts into the "Holder_In" and connect the two parts that way.

Both, mine and Freddy's spool holder are designed for 608ZZ ball bearings.

I fixed the PTFE tube in the 90 degree holder with super glue

storage containers from amazon: https://www.amazon.de/dp/B0B2HWT6PF?psc=1&ref=ppx_yo2ov_dt_b_product_details