Specifically, they switched to a Corning-designed soda lime glass that has much better shatter resistance, but less thermal shock resistance.<p>However, I don&#x27;t care what Pyrex consumer products say, either back when it was ran directly by Corning, or when they spun World Kitchen off, putting a fridge cold borosilicate or soda lime Pyrex product into an oven risks blowing it up, as does taking an oven hot dish and putting it on anything other than a wire cooling rack or a pot holder.<p>Just don&#x27;t do it.<p>Fridge cold into the microwave, however, is fine, as there is no instant thermal shock there.<p>That said, I have Pyrex older than I am that is borosilicate, stuff that&#x27;s a bit newer, and then stuff I&#x27;ve bought that is the new soda lime. People act as if the soda lime glass is shit, and it&#x27;s not: it is the same high quality Pyrex products we&#x27;ve always enjoyed.<p>As a warning: do not buy Anchor Hocking&#x27;s knock off for any sort of heated cooking. I don&#x27;t care what they say, their shit will happily blow up; I know two people who this has happened to, and the Internet is full of bad reviews over this. Anchor Hocking glass products are fine for kitchen storage, however, just never cook with them.