Room Essentials&trade; Coupe Gray 12 piece Dinnerware Set Set the table with Room Essentials Coupe Gray 12 piece Dinnerware Set. Made of colorful glazed stoneware, this basic dinner set includes service for four with dinner plates, salad plates, bowls and mugs. Soft gray tones add polish to the dinner table, and the simple design is at home in a modern setting. Microwave and dishwasher safe, this stoneware dish set is style and substance combined.