Many intructables for Altoids cases are full of unnecessary things and statements, to make a much more easier and quicker instructable, I wont put that stuff in.
Step 1: Materials
You can use a wide array of tools. Since I didn't have any power tools at the time, I used a fatmax and a hand drill. I don't recommend using those, because it took me an hour.
A drill bit would work, a power drill, MAYBE a sharp metal skewer, but the tin is pretty strong.
And you can use styrophone or tin foil for the inside. I used foil.