I have never liked using the penny, just because it's another thing that I have to carry and keep track of.
And also I like the fact that once it burns dowl a little the center hole turns into a small burrner as well.
Take a look.
I dint time any of this. maybie I will do it again latter and actualy boil some water.

Burnners just lit

Great flame pattern

Close up

From above

Nice thing about the aluminum is it cools off fast.
This was about 40 seconds after it burned itself out. (and its still pretty laugh )