I've been more or less living in a tent in Europe for 2 years, and I have taken draining canisters to an art form. I favour the 'Yanni' approach of adeptly swapping pots and gradually decanting gas canisters until their final breath. Fine for car camping - not really that helpful if you have to carry them out bush.
Congratulations on killing 10 of the little blighters!
Reggie

PS Yanni https://en.wikipedia.org/wiki/Yanni was truly at his best Live at the Acropolis. How can one man play so many keyboards at the same time?