NMoasis said:Vintage Pyrex is great, as long as it isn't so old it contains lead. But I would seriously dump old Tupperware 😵
Sally, I remember the candles in Italian wine bottles, the ones with raffia holders. Required decor at the time. Along with the macrame plant hangers!
True Pyrex, the stuff made by Corning, never contained lead: in fact Pyrex was developed before WWI precisely to have a low expansion glass that didn't contain lead, like the then-existing Nonex. The only metal contained in classic Pyrex borosilicate formulations is aluminum (about 1%). Some industrial-grade formulations also included iron and magnesium, but they were never used to manufacture casseroles.
Corning changed consumer-grade Pyrex from borosilicate to tempered soda-lime glass in the early 80's, effectively cheapening it out, and that's what makes older Pyrex so valuable.
Lesson for today: never as much mention some things in front of a pedantic chemist.
