Vtg Tupperware “Ultra 21” Microwave & Oven (2 qt) Covered Casserole Dish Soup Tureen Review August 1, 2018November 10, 2018 - DesertMango this is a vintage tupperware covered casserole dish. it is from the “Ultra 21” line. It will hold 2 quarts. It has a top and bottom. It can also be used as a soup tureen (just flip the lid upside down) and there is an opening to put your ladle.