Mauviel Made In France M'Passion 2191.26 Copper 10-Inch/4.6L/4.9-Quart Egg White Bowl with Ring 10.6-Inch copper bowl for beating egg whites Copper material interacts with egg proteins to produce fluffy, high-rise whites Allows whites to reach full volume and stiffness Brass side ring lets chef hold or hang bowl Hand washing recommended; limited lifetime warranty In 1830, in a Normandy village called Villedieu-les-Poles,, Mr. Ernest Mauviel established the Mauviel manufacturing company. Since the very early years, Mauviel has been a fixture in the professional and commercial markets. Mauviel continues to offer the professional chef, products that are unsurpassed in quality and design. These same products are now also available to household markets.