Spode Baking Days Blue Square Bake and Serve Dish 1-10.0-Inch Square Bake and Serve Dish Made of opaque white vitreous Stoneware Available in Black, Blue, Red, Green or Navy with White Polka Dots Oven Safe to 475 degrees; Dishwasher safe Microwave Safe Never place empty items in microwave or oven; Guaranteed against manufacturer defects; For further information please contact The Portmeirion Group at 888 778-1471