This is a [pencil cup / desk organizer / workbench organizer / flower pot / whatever you want it to be].
I made it with dimensions totally different from the real thing, just to make it easy to print, aesthetically pleasing and useful for storing lots of things inside.
I printed it at 60% scale because I made it a bit big. You can resize it in your favorite slicer to the size you need.
You can imagine a base on which to mount the cylinder with a bearing to make it rotate freely, and if you want to go further, make a mechanism with a knob to push it tangentially like a real revolver cylinder.
Revolver_cylinder_pen_cup.stl | 1.3MB |