Made this specifically for Papermate Flair 0.7mm felt tip pens, sold in a package of 16 assorted colors. Basically just a compact, no-nonsense holder for 16 felt tip pens. Note however, that the pens are held "splayed out" so that the colors are easy to see, and the pens are easy to get at.
This might work with other pens as well. The Papermate pens have a small diameter of 8.25mm, and when measured 55mm from the end have a diameter of 9.87mm. I made the opening for the pens oversize by 1mm. Pens fitting within these dimensions will work, and of course the print can also be scaled.
A simple "test block" is included which can be printed to test pen fit.
The OnShape 3D CAD files for this are here :
Print in PLA using the 3MF files provided; otherwise:
The author marked this model as their own original creation.