Highly related to Modular Sharpie/Pen Caddy, I got some fat chisel-tip sharpies and made a wee caddy for them with some help from Box-O-Matic. Took me forever to get the holes the right size and the alignment correct, so I figured it was worth sharing:
Colors on the SVG are all different since I wanted to be able to move individual bits to be able to use different pieces of scrap wood. Definitely needs gluing but this was a fun way to burn off (har) some scrap pieces.