These are a good way to carry a minimalist fishing kit that doubles as a sewing kit. These are easy to make; I use a safety pin to wrap the fishing line around and to attach the paracord lanyard. I usually use gaff tape when I can, because gaff tape doesn't leave as much residue as duct tape, but duct tape will work. Everything else is pretty much self explanatory (don't forget the sewing needles and make sure they will fit your fishing line!). A tip is to fold over a little bit of tape on the edge so it is easier to open.
.....you can rig up a reel for casting using a water bottle or the like.