The Vintage Corning Ware P-1-B Blue Cornflower 1 QT. Casserole Dish Without Lid is a charming piece of mid-century modern cookware with a blue floral pattern. Made of ceramic and featuring a glossy finish, this square-shaped casserole dish is perfect for use in electric, gas, or microwave ovens. Produced in the United States using fused glass production technique, this original piece by CorningWare is sure to add a touch of retro style to any kitchen.