I have heard of something call titanium foil. It is probably more expensive than plain old aluminum, but possibly it might stand up better to folding. I have no experience with the material at all, so this is rampant speculation.
Interesting. Titanium is becoming the go to metal for hikers especially the Ultralight ones. I wounder what a roll of of it would cost and how well it would preform. I feel an experiment in the making.
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