I normally carry a Sharpie as part of my EDC, but I've run into issues where the Sharpie clip on the cap doesn't get a good hold of my pocket, causing it to fall into my pocket. I decided to try to fix that. I used Line Arc Line's perfectly accurate Sharpie file as the cap design, and New1's clip for a knife to create exactly what I was looking for. I printed in PETG for the strength and flexibility, but I imagine it will work fine in PLA.

I'm sure there is a pretty small market for a print like this, but hopefully this can save a handful of people some time and frustration.