devilsaltarboy
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The glass shot bottles are made of borosilicate glass, this is very resistant to thermal shock. We freeze dry things in shot bottles and dip into liquid nitrogen (bloody cold), no evidence of thermal shock whatsoever. The glass is also obviously chemical resistant, clean them with caustic. The schott bottles will handle an autoclave easily. I have never seen borosilicate glass crack under thermal shock and I use this type of glass routinely and abuse the crap out of it
Cheers
Peter
Cheers
Peter