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https://en.m.wikipedia.org/wiki/Borosilicate_glass
Quite a bit more expensive, though. And even better would be pure SiO2, fused quartz/silica.
https://en.m.wikipedia.org/wiki/Fused_quartz
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https://en.m.wikipedia.org/wiki/Borosilicate_glass
Quite a bit more expensive, though. And even better would be pure SiO2, fused quartz/silica.
https://en.m.wikipedia.org/wiki/Fused_quartz