Volcano Pen Cup / Organizer

I wanted a pen cup/holder/organizer that gave me easy access to my most used pens outside of the cup portion.

The design I came up with I've called the Volcano Pen Cup.

It has multiple slighly angled holes on the outside of it that are sized to fit Micron pens, sharpies, uni-ball eye pens, BiC Intensity pens, Uni Kurutoga mechanical pencils, etc...

The bottom is relieved (requires support) so that it doesn't have warping issue when printing with filaments that are predisposed to warp (like ASA which is what I mostly print with).

I would recommend more walls (like 5 or so) for sturdiness but the infill can be as low as 5% depending on your printer and material.