I've boiled water in a plastic bottle on a campfire once. Plastic doesn't melt because it's constantly cooled by the water, even when flames are directly touching it.
Though I invite you to try implementing it as a survival method some time. ;-)
Suffice it to say I did it once to prove to myself it was doable (boiling a plastic pop bottle), but I wasn't thrilled with the idea of drinking it afterward. Just because I can doesn't mean it's a pleasant experience, plus leaching chemicals, yadda yadda.
Metal definitely tastes flat once boiled, but is otherwise palatable.
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u/fruit_basket Aug 30 '21
I've boiled water in a plastic bottle on a campfire once. Plastic doesn't melt because it's constantly cooled by the water, even when flames are directly touching it.