We collaborated with the legendary coppersmiths at Ruffoni to create our exclusive Thermo-Clad™ Copper series. Designed to bring the joy of cooking to home cooks, the bonded pans combine the superior heat-conductivity of copper with the nonreactive durability of stainless steel. This Italian-made soup pot provides maximum heat responsiveness for professional-level sautéing, simmering and braising. It comes with a double-wall insulated stainless-steel lid that helps lock in moisture and keep food warm. Combines thick, mirror-polished copper with interior layer of 18/10 stainless steel. Made from 1.2mm-gauge copper. Solid copper conducts heat quickly, ensuring quick, efficient and uniform heating with precise temperature control. Stainless-steel lining is nonreactive and durable. Ergonomic stainless-steel handles provide comfortable grip and maximum control. Double-wall insulated stainless-steel lid. Oven safe to 450°F; lid is oven safe to 375°F. Handcrafted in Italy by Ruffoni exclusively for Williams Sonoma.