Calphalon Unison Nonstick 13-Inch Flatbottom Wok with Lid Unison cookware is built with dishwasher safe nonstick so you can cook with professional precision. Specially-textured Sear pans seal in flavor and provide perfect browning of meats, fish, and vegetables. Clear tempered-glass lids let you see food while it's cooking and are oven safe, so you can finish covered dishes in the oven or keep them warm until ready to serve Adapted from a traditional round-bottom wok, this flat-bottom wok has a wide cooking surface ideal for stir-frying on gas or electric ranges. The domed cover is perfect for steaming and simmering soups. Long, quadruple-riveted stainless steel handles on stir fry pan stay cool on the stovetop. All cookware is dishwasher-safe and carries Calphalon's full lifetime warranty.