New Red Microwave Tool Accessories Potato Cooking Bag Great for all types of potatoes, corn on the cob, day-old bread, tortillas and more. Creates a steam pocket to cook perfect potatoes in the microwave in just 4 minutes. cooks 4 potatos at once Delicious, steamy perfect results. Washable and reusable. Perfect for holiday cooking. Re-usable. Machine washable. Material: polyester fabric, fiber.