Our product is made entirely by hand. The embroidery on the outside is hand-forged. It is made of 1 mm thick copper. The interior parts are tin plated. Content Upper teapot 0-8 lt Lower teapot 1-2 lt- Products are completely handmade. All the products we sell are under our company warranty. IMPORTANT NOTE: DUE TO ITS FEATURES OF COPPER, IT CHANGES COLOR WHETHER IT IS HEAT OR NOT.