Did you ever stop to consider that these two products aren't the same? Choosing between a propane and butane gas torch ...

Butane fuel is mixed with compressed air to keep the fuel flowing safely inside the torch, but after the fuel is expended, there may still be some air left in the tank. As long as that air's in ...

Well, you might want to watch this video of how to make a mini butane torch ... compressed air tank instead. For a slightly more robust solution, why not build a mini HHO torch?