That's right. It was something of a cookware experiment that worked well enough for it to have stuck with me. I ususally fill the flask with 750ml of tea and that will take me between 5 and 7 minutes to get boiling.

Funnily enough I have been examining plans for a soda can stove. They look lightweight and efficient. Something like this looks perfect. Time to break out the tools.

The PSK is this size: