Review on 🍽️ KOOV Ceramic Bakeware, Square Baking Dish, 8x8 Brownie Pan, Reactive Glaze, Variable Grey - Perfect for Cake Dinner, Kitchen by Yolanda Hardison

I've only used it in an oven (regular gas range) and never went above 400 deg/F. After a few months of use, a hairline formed on the buttocks - about a week or two. The crack was imperceptible, and therefore the liquid spilled, making mush both in the oven and on the table. I do not recommend this brand of ceramic tableware. I bought this to replace a Pyrex glass top and while it looks more attractive it lacks quality.