Pyrex is a great invention. It has contained more potluck casseroles than any other container invented. I recently learned that Pyrex can break when heated to high temperatures. And when it does, be prepared ... it shatters into a million little pieces. This is what the roasted tomato-balsamic soup looks like when violently blended with a splintered Pyrex dish:
Keep in mind that this was at 500 degrees for 40 minutes. There were no sudden temperature changes. It simply exploded. So, if your Pyrex (or Pyrex knock-off) has been compromised with ANY small nicks or scratches, do not use it (especially at high temperatures). From now on, I think I'll stick to ceramic. If it shatters, it won't splinter like this did.