you probably know someone who uses a lighter for one reason or another. and most likely that lighter is a disposable butane lighter. there is a flint in every one of these lighters (not piezo electric) that is made to outlast the butane contained therein. why buy flints when you can reuse that spent lighter's flint in your zippo?
here's how to harvest the freebies!!!!
Step 1: No man left behind
Step 2: Void the warranty
just get funky on it and pull off the flint wheel. a set of pliers will suffice. the rest is cake. just make sure when the spring pops out you keep your hands around it to catch the flint that will otherwise fly across the room.
once you have the flint out, put it in your zippo.
free rhymes with me. . .