SpudFiles

Deoderant cans are butane, isobutane and propane generally. Usually a mix of 3. If you wanted I'm sure you could adapt it, but I've blown up too many deoderant cans with guns to actually use them in a gun.

Sniper hero had a good idea. Those are basically water bottles. You can get them in camping stores and they're fairly thick but light aluminium. Plus I think the threads are NPT, but don't trust me on that one.

Quote:Plus I think the threads are NPT, but don't trust me on that one.

they 3/4 female thread but the neck is too short so air leaks even when teflon is used but with minimal adaptions it will be air tight

It seems that the deo can idea can be thrown into the garbage bin, because the walls are only like 0,5mm thick...
(yes i've opened some and measured it)

But it has some interesting O-rings and springs in it's small valve.

I bet it is some sort of poppet valve. Could be used to construct a miniature hammer valve, to pilot miniature piston valves. Madurodam style xD