>>>>Campers have used coffee cans for decades as cooking pots.  I'll bet
every mid-twentieth century hobo who ever cooked over a jungle fire ate
stew out of a coffee pot.

Right out of the Boy Scout Manual too as I recall (1962 :o) !

But food grade or not, I dont think they're thinking that much heat!
In a stove would be one thing but against your food maybe another?

A strip of stainless with a hook or bent tab, to hold it round when needed?
And a round, perforated  disc to set on top?

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&&& How many old hobbo's do we still see around?
maybe that's why?  heh...heh...
(about as many as  old painters & welders...  ;o(

protect your health!

JC...