thedmz t1_jd1o5t6 wrote on March 21, 2023 at 4:37 AM Reply to Pyrex, GlassLock, or Anchor Hocking food storage? by OpALbatross Older Pyrex will be borosilicate. Look for the blue green tint on the edge. Change was late 90’s I think. The old stuff is way more durable but I have newer pieces going on 15 years Permalink 2
thedmz t1_jd1o5t6 wrote
Reply to Pyrex, GlassLock, or Anchor Hocking food storage? by OpALbatross
Older Pyrex will be borosilicate. Look for the blue green tint on the edge. Change was late 90’s I think. The old stuff is way more durable but I have newer pieces going on 15 years