Thanks for the Pyrex primer, EPD. I was trying to recall what I learned when I was researching my ancient British mother's collection and unfortunately the info has faded from the grey cells. I have some vague memory of reading about metal content in the old stuff...was there an old, original British pre-Corning firm? I do recall that some of the pieces I had were Pyrex-like but a different brand. Seems we unearthed endless iterations of individual custard bowls, both glass and ceramic. I use some for soap dishes.
