I got a new pen and even though it has a clip i wanted to make something to help keep it from rolling off the desk and also wanted to see if I could prevent that bit of dried ink that can form on the tip sometimes. So this is equal parts test and idea fulfillment. Might be good for traveling as well, give it a shot!

I designed it around the "Jetstream Lite Touch" which is 11.44mm at the widest part of the grip section. Designed to be printed in TPU or any similar flexible filament. It may leave a depression on the grip but to me it's inconsequential and gives me a nice non-visual grip location indicator.

Versions: "pan cap v001" has one flat and does a good job of preventing the pen from rolling. I then decided to make a variant, "pen cap anti roll v001" and focused more on something that would prevent the pen from rolling rather than just be a cap.