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I have been cooking in the smaller sized tray for some time with great success. However, the 9x13 warps in the oven and the dome lid won't stay on. I wanted a disposable container for my casseroles, etc. that looked nicer than a foil pan.
Thank you for your review, LeAnn! For heavier items, we recommend using this Solut Bake and Show Black Quarter Size Oven Safe Sheet Pan. A Customer Solutions Representative will contact you soon.