First, I am not sure if this is useful for anyone else but myself.
I play my guitars in random places in my home, and I constantly find myself searching and walking around to house for a pick, the capo or the metronome. I thought it would be nice to put everything in a 'kit' and carry around as a whole. So here cames this design.
It will hold - some picks (different slots for 0.8, 1.0 and 1.2mm thickness), - a metronome in the front and it can be used in place. (4" wide by 0.6" deep). You may use it as a phone stand as well. - a capo in the pocket in the middle - also some little random stuff in the pocket on the back, such as a 1/8" to 1/4" adapter.
Feel free to tweak or remix into whatever suits your need. https://cad.onshape.com/documents/b4333fcffc2865470255baa7/w/c81ab75cc263b9bcc6952a94/e/5297e951da4591ba3a8b1472