Rhetorical question o' the day: if you burned down Texas, how would anybody notice? grin

My copy of the basic brass Trangia burner has a sealed screwcap and a second adjustable cap with a pivoting top for rudimentary flame control. The adjustment more or less works and if you shove it all the way closed, douses the flame. The fuel has a tendency to boil off before it cools enough to put on the screwcap but if there's any fuel left, it stays put until next use.

Compared to a homebuilt alcohol burner, the Trangia is probably a little safer and a lot more adjustable. I can actually cook over one, versus just boiling water.

Cheers,
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--Rick