I guess they did for #pyrex too:
🔥 The Two Types Of Pyrex: Borosilicate Vs. Soda-Lime Glass
1. Borosilicate Pyrex (Vintage Pyrex)
Thermal Shock Resistance: Excellent
Oven, stovetop, and freezer safe
Less likely to shatter under temperature changes
Original formula Pyrex was introduced by Corning in 1915
Production changed to the inferior Soda-Lime Glass in 1998 when Corning sold the Pyrex brand to World Kitchen (now Instant Brands)
https://garisgalley.com/how-to-tell-the-two-types-of-pyrex-and-why-it-matters/
