I understand your concerns but it was meant for baking. See?
Cornbread and hotdogs baked in a Hostess bowl.
BBQ Chicken baked in a Hostess bowl.
Cake baked in a 404
Autumn Blush baked in a round Utility dish....
And just yesterday Pecan Brownies baked in a Horizon square baking dish.
Delicious and no breakage!. All pics except the last one were taken from Pyrex Prize Recipes Copyright 1953