1. Grab a pair of cheap 97 cent walmart earbuds (or dollar store ones with free scan radio!)
2. Snip the actual speakers off from the cable. Save them for later use as ninja throwing weapons.
3. Poke a small hole through the side of the altoids tin.
4. Stick the wire in through the hole and tie a knot in it 2 inches from the cut end so it doesnt come out.
UPDATE: 5.Put some duct-tape or electrical tape around the wire that will be going through the hole and around some of the knot so the tin won't cut into it.