Don't throw away those used lighters, instead turn them into a fire starter.
I hate to see anything go to waste, so whenever a disposable lighter runs out of fuel I either turn the flint into a firework (see here), or make one of these. The fire starter is made from the spark wheel, spring and flint from the lighter. The body of the fire starter is made from copper.
There's nothing too difficult making one of these, the hardest thing probably is adding the spark wheel to the copper bracket. It took me a couple of times to work out the best way to make this section.
The spring is held in place with a screw which has a ring soldered to the bottom of it. This makes the flint easy to change.
Without further ado - lets get started
1. Lighter. Use a large one if you can as it has a bigger flint.
2. Copper tube. The size will depend on the dimensions of the spring in the lighter. I pulled apart the lighter and took this to the hobby shop to find the right sized tube
3. Copper strip. Hobby shop. Don't get it too thick or you will never be able to bend it. Same goes with too thin!
4. Copper wire. Hobby shop. This is used to make the ring
5. Screw. The screw should just be a little larger than the inside diameter (ID) of the tube.
1. Pliers. needle nose and any other small pliers
2. Small files
4. Mini blow torch