Ultra durable and long lasting ? the Gotham Steel bakeware has a best in class 0. 8 mm Thick gauge which won?t warp and heats evenly so your muffins come out of the oven perfectly and evenly browned Premium non-stick ? constructed from solid aluminium and coated with ceramic ensures the ultimate release -- everything just slides right off the surface, No need for baking sheets, oil or butter 12 cup muffin pan ? bake 12 full size muffins each time Doesn?t warp ? can withstand years of use without warping because of its thick construction, with rolled edges to ensure the aluminium doesn?t warp or flex Metal utensil safe - scratch-proof & metal utensil safe Oven safe ? high heat Safe up to 500F Dishwasher safe Makes for an effortless cleaning experience Toxin free - All Gotham Steel products are PTHE, PFOA and PFOS free