Using this tutorial, I made them with mason jars and skull and skeleton fabric, and filled them with an assortment of black buttons. Then I added a few skull and bones decorations and a white guitar pick to each jar.
I was lucky to find the black pleather eyelet trim in just the right width, by the yard at Joann fabrics.
The skull pins were made by snipping off the bead ends of stickpins, and gluing on a tiny skull bead.
I have a couple listed in my Etsy \m/ >_< \m/
photos by Ronnie Williford