Filament Spool Reel Holder and Hanger
Thought this might be helpful for some other folks, as I personally use quite a few of them.
A lot of my office furniture uses 3/4" support bars. This reel holder semi "snaps" onto those bars and hangs your filament reels for convenience.
I did the design so it would handle all of the reels that I have. These include Sainsmart (cardboard), MakerBot (1kg and .5kg), Prototype Supply, Ninjaflex, and others.
I printed these in ABS. Two shells and a 25% infill. Plenty strong with little deformation.
Enjoy!