• SaveTheTuaHawk@lemmy.ca
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    2 months ago

    They need to vacuum insulate because heat conductive metal would be a stupid choice of material, as opposed to glass or plastic.

    • Atelopus-zeteki@fedia.io
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      26 days ago

      Etsy vendor comes up with a Fancy Woven Wool Insulating Sheath, in Many Colors, in 3, 2, 1… I end up using a sock.