Tupperware ULTRA21 Baker Japan Tupperware Co., Ltd. Capacity: 500mL Oven and microwave safe. Heat resistant up to 260 degrees Celsius. Cold resistant down to -40 degrees Celsius. Seal (transparent lid) is not compatible. Heat resistant up to 80 degrees Celsius. Cold resistant down to -30 degrees Celsius. The box is quite dirty due to long-term storage. However, the product itself has no stains. I am also selling other Tupperware items, so please take a look if you'd like. Also, individual sales and combined sales with other items I have listed are possible, so feel free to comment. Tupperware Japan Tupperware