Submitted by OpALbatross t3_11twps7 in BuyItForLife
GeneralTBag t1_jdcs7ra wrote
Reply to comment by pan567 in Pyrex, GlassLock, or Anchor Hocking food storage? by OpALbatross
As far as I know, made in USA is tempered, made in France is borosilicate. You can tell the difference easily by the blue hue in the glass.
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