Take the tour ×  I take a Primus EtaExpress stove with me when
camping, and am slowing accumulating a collection of canisters
with only around ~20% gas in them.  With this little gas, they
don't have enough pressure to be useful in anything except ideal
conditions (hot, windless, and you have all the time in the
world) but I'm reluctant to dispose of them.  Is there a good
way of constructively using up the remaining gas - and what's
the right way to recycle the canisters when they are properly
empty?  enter image description here  share|improve this
question add comment  1 Answer  up vote 5 down vote accepted  To
Dispose: Vent all the fuel, then puncture the sidewall. Once you
have done this, it can be dumped in the appropriate recycling
bin. Jetboil makes a tool to help with this, for which they've
made a nice instructional video.  To Use: An option to wasting
that last 20% is to have an inverted canister setup. Since this
relies on gravity instead of boiling via depressurization then
you will use more of t