Moving a Pyrex dish directly from the freezer to a hot oven is even riskier. Whether it’s older borosilicate glass or the tempered soda-lime glass commonly used in many newer Pyrex products, no glass is completely immune to rapid temperature changes. Frozen meals should be thawed first whenever possible or transferred to another suitable baking pan before cooking.
It is also wise to avoid placing hot Pyrex on cold or wet surfaces, adding cold liquid to a hot dish, or exposing it to sudden changes in temperature. These situations can also create thermal stress that weakens the glass.
With proper care, Pyrex can last for decades. The key is to treat it as durable glass rather than an unbreakable product. By respecting its temperature limits and avoiding sudden changes, you can continue using your Pyrex safely for baking, cooking, storing, and reheating meals for many years.