All L'Objet collections are made with exceptional materials, and with proper use and care, will last for generations. L’OBJET dinnerware with metallic accents are dishwasher safe, using a gentle, energy-efficient air-dry cycle or may be hand washed and dried with a soft cloth—Handwash oversize pieces. Do not overload the dishwasher. Avoid abrasive soaps and detergents containing citrus scents or additives. After use, rinse in hot water to avoid prolonged contact with acidic substances, which can stain a metallic finish. When storing, stack carefully to avoid scratches in the metallic finish. Pieces with metallic accents are unsuitable for microwaves, but the non-metallic ones will do just fine.