With a diamond-layered cooking surface, the Swiss Diamond Covered Nonstick Casserole is PFOA-free and will not peel, crack or blister. Over 200,000 minute diamond crystal particles reinforce the soup pot cooking surface for unsurpassed durability. Diamonds are the hardest material known to man and nothing conducts heat more efficiently or quickly than diamonds. The Swiss Diamond casserole forms a golden crispy crust on deep-dish favorites like lasagna and macaroni and cheese. With its patented nonstick cooking surface and fitted cover, the Swiss-made soup pot effortlessly creates savory stews, hearty soups and creamy quiche. The vented, heat-tempered glass cover with a stainless-steel rim offers see-through convenience. Swiss Diamond thick pressure-cast aluminum construction delivers even heating and prevents hot spots and warping. The nonstick cooking surface ensures hassle-free food release and quick cleanup. With ergonomic stay-cool handles, the Swiss Diamond cookware is oven-safe up to 500 F. The perfectly flat bases are ideal for ceramic, gas, electric and halogen cooktops. Metal utensils will not harm the dishwasher-safe soup pot. Winner of the coveted International Inventors Gold Award, Swiss Diamond nonstick cookware is produced in the heart of the Swiss Alps. Laboratory tests have proven that the patented Swiss Diamond nonstick cooking surface is superior to all other nonstick surfaces for durability and efficiency.