Here’s a unique way to get a handle on a zipper while showcasing something you like. To remove the plastic housing from the brass heat it with a heat gun until the plastic is soft. The shell will slide right off with a little encouragement. Next drill a small hole in the shell, run some cord through it, and tie a knot to secure it. Follow step 7 from DIY cufflinks
to set a picture in the opening of the shell. The image shown belongs to an awesome art gallery in Kentucky.
Use an expended cartridge. That means a shell that has already been shot. Do not under any circumstances use live ammo.