/pedant If you are looking for Pyrex dishes. make sure you get the older borosilicate ones. The brand name was spun off, and they changed the glass formula to a soda-lime composition, theoretically because the new formula was less prone to mechanical breakage. They are much less heat tough now, and have been known to shatter from temperature changes (like being put in/taken out of a hot oven). The old ones were based on laboratory glass, and had far fewer malfunctions.
9 Likes
