[govspy]

>2. How would it handle for cookware? Will it last even if an ignorant person left it in the oven for hours on end?

Pyrex has been around since the 1910s and doing this just fine ever since.

[politician]

Well, Corning sold the brand name Pyrex around 2000. A post-2000 Pyrex item may not have the same composition as the Corning product you're more familiar with.

[govspy]

The composition of the Pyrex glass sold in North America did change from borosilicate glass to soda-lime glass when the brand changed hands, yes. But the important thing about "glass not breaking at high temperatures" has much more to do with the annealing process than it does the type of glass.

[nly]

Pyrex will shatter if you take it out of a blistering hot oven and pour cold water on it (e.g. to let stuck on food soak).

[yyyyyak]

Yah...I just learned this the hard way. I took it out of the oven and put in on the cold granite countertop.

[govspy]

I never said that Pyrex is unbreakable. But it certainly wont break just because "an ignorant person left it in the oven for hours on end".

Almost every material known to man will break/crack/shatter/do-something if you rapidly cool it from an elevated temperature.

[d2xdy2]

Yeah, taking a piping hot casserole dish out of the oven and placing it on a damp rag on my counter showed me this feature. Pretty terrifying at the time.