> The new owner...recognized that the cookware didn't need to be quite as strong, and — to make it accessible to the average customer — it needed to be more aff

> The new owner...recognized that the cookware didn't need to be quite as strong, and — to make it accessible to the average customer — it needed to be more affordable. With this in mind, they switched the cookware to soda-lime glass, a less expensive component. Soda-lime glass, now called pyrex, isn't as resistant to thermal shock, but it is durable enough for everyday cooking. Was Corning's borosilicate cookware tempered? Tempered soda-lime class is more resistant to breaking from rough handling than borosilicate, so there's a real tradeoff between the two.