Our top-rated Naturals® Bakeware collection is made of pure aluminum for superior heat conductivity and produces consistent evenly browned baked goods every time. Encapsulated galvanized steel rims prevent warping. Creativity meets natural aluminum sustainability. Bake and serve treats in style with a decorative embossed Baker's Half Sheet. We've added a pleasing ornament design, embossed right into the surface of the pan. Not only is it far more fun than your average cookie sheet, but the pattern serves another purpose too: it adds rigidity to the surface of your baking sheet to prevent warping. We love using this pan as a serving tray, too--for your holiday party, try serving a heap of cookies with mini glasses of cold milk for a hard-to-resist treat. Dishwasher use is not advised as discoloration will occur due to the cleaning agents used in automatic dishwasher detergent. This discoloration is merely cosmetic and will not affect baking properties or safety of the pan. Works well with parchment paper, silicone baking mats, and also traditional butter or shortening and flour methods. When roasting savory foods such as vegetables, butter or cooking oil work well. Nylon, wood, or silicone utensils are recommended. Metal utensils and scouring pads may scratch natural aluminum pans, but will not affect baking performance. Aluminum is reactive to acidic ingredients such as vinegar and tomato products. These foods may darken, pit or corrode the pan after prolonged use. Made in America of domestic and imported materials. Our aluminum bakeware-quality pieces are made to withstand a lifetime of use in your home kitchen.