For cookies, dinner rolls or other baked goods, reach for this large cookie sheet from Calphalon. It's insulated for better baking performance. The two upturned ends are for lifting the cookie sheet; the open sides allow items to slide right off. It's Calphalon's most durable bakeware ever - their new Classic Nonstick bakeware line with a reinforced nonstick for lasting durability. The bakeware is made of aluminized steel that resists rusts. Classically designed for professional results, the Calphalon Classic Nonstick bakeware is dishwasher-safe for easy cleanup.