Round Tins are GREAT for fishing kits though. You can even find or make tiny reels and spools to hold your line that will fit in one. Currently I use spent Shotgun shells for fishing kits. I can jam alot into a 2 3/4" 12 gauge shell. Mine hold hooks, split shot (appropriate), lures, rubber worms, trout beads, flashers, spoons, and other assorted tackle like barrel swivels and clips. Line is wrapped around the outside of the shell and held in place with a bit of electrical tape. The whole thing is capped off with a foam cork cut from a stick float. Size of your thumb and you can bring in anything from crappie to cutthroat to chinook salmon. Plus the shell fits in most shotgun bandoliers and elastic holders.