Aluminum reacts with water to create hydrogen, what's wrong with the alumium in pop cans?
Also I bought this on ebay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=150142778632&ssPageName=STRK:MEWN:IT&ih=005
because I saw a post on this forum saying to mix that with a popcan tab and water to make hydrogen, I think that's what it said, can't find it now. thx.
I believe aluminium pop cans have a coating of varnish.
You might try using an evaperator from an auto air conditioning system. Can get them cheap from a junker that already has the engine out at the wrecking yard.. Be careful to get aluminum not stainless.