I drew this up really quickly in Fusion360 in an hour or two. I saw something similar to it on Thingiverse, but it wasn't quite what I was looking for, so I made my own. It has two slots, one deep and one shallow, along with a little compartment for a pen or something. It also has a hook for keys or something. To save on printing material, there is a section cut out on the bottom below the shallow slot, and I have put in custom made supports so no support material is needed. For mounting, I just used some 3M poster strips on the back and stuck it to the wall above my nightstand. Please post your makes, it would mean a lot to me! Also, if you have any ideas or changes that could be made, put them in the comments.
Whatever you think it needs to be for strength
I designed the walls to be one perimeter on a 0.4mm nozzle, if you have a larger diameter nozzle it might not slice properly, I'm not sure.
Remove built-in supports from underneath