Do YOU know the difference between pyrex and PYREX?

If you prep your food or warm up leftovers, it could matter!!!

Uppercase PYREX is borosilicate composition, a glass made of silica and boron trioxide. OOOO what the heck does that mean. Two words – oven safe.

Lower case pyrex is tempered soda-lime glass. NOT oven safe.

and now you know!