A filament spool holder. Two pieces with a screw. Adjustable for various spool widths. Nothing special. Three of these fit side-by-side into cheap clear plastic storage containers sold at my local hardware store. Add three of my filament funnels, some length of bowden for each and the bowden clip on the outside of the box, and you've got yourself a filament dispenser box ...

Updated 2019-08-23 with a new variation with longer cylinder for wider spools