Organizer that holds 17 paintbrushes vertically in the Skadis cup accessory found in the organizer set here: https://www.ikea.com/us/en/p/skadis-7-piece-accessories-set-white-20586420/

The cup fits brushes up to 10mm in diameter, but still keeps smaller brushes vertical via tapered holes in the bottom piece.

Print Settings:

Print booth parts top down, filament and print settings should not matter, support is not needed. 

The bottom part should wedge itself through the top of the cup and into the bottom, and not rattle. You can use glue to secure it, but it shouldn't be needed. 

The top part will take some pressure to install, but should also snap in. Some glue may be used for this part if its a little loose.