A notepad holder that serves as a kind of inbox with a "you've got mail" flag that flips up when the lid is lifted. It's a far from elegant, a pretty rough design mainly for my own use but serves its purpose well enough! The pen holder is not very secure, you could add a conical shaped holder at the bottom to improve this but I've just used some blu-tak which does the trick. You may need to slightly widen the flag hole to loosen the fit if it's overly tight. I printed the base/enclosure with supports, but it might be possible to avoid them if your printer is particularly good with bridging. Cura's generated supports weren't too difficult to remove in my case.