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Purist has some cool plastic bottles with a glass liner: https://www.specialized.com/us/en/purist-watergate-water-bottle/p/161979 https://www.specialized.com/us

• timschmidt 1y ago
  > features an amorphous silicon dioxide coating that's infused into the inner-wall of the bottle. Essentially, this forms a glass-like finish that provides a totally natural, and completely inert, solution to the problem "glass-like" != glass Dollars to doughnuts that coating is spray lined. Which means some sort of solvent, at a minimum. And I'm unaware of any way to fuse silica at temperatures under which plastic would survive, so it's a coating with a binder (dissolved in the solvent) which can still be damaged, scratched, leach or flake off into the water. I wouldn't touch it with a 10 foot pole. Glass, stainless steel (316 please), or ceramics for me.