Borosilicate Glass Food Container vs. Pyrex Glass Food Storage Containers

This is one of the more nuanced comparisons in food storage. The Pyrex brand has a significant historical reputation because the original Pyrex formula used borosilicate glass — a thermally stable glass that handles dramatic temperature changes without cracking. However, since the brand was sold in the 1990s, US Pyrex products have switched to tempered soda-lime glass, which is less thermally resistant than borosilicate.

European Pyrex (sold under the same name) still uses borosilicate glass. US consumers buying from Amazon or American stores get soda-lime tempered glass under the Pyrex name, while European brands like Pyrex Europe and generic borosilicate glass products use the original formulation.

From a food safety standpoint, both are excellent: soda-lime and borosilicate glass are both chemically inert and do not leach anything into food. The meaningful difference is thermal resistance — borosilicate handles going from freezer directly to oven better than soda-lime, which can crack under extreme thermal shock. Both rate 'best' for chemical safety. If you are doing a lot of freezer-to-oven cooking, borosilicate is the more thermally robust choice. For standard refrigerator storage and oven reheating, either performs safely.