Oven and microwave safe. Heat resistance: 260 degrees Celsius Cold resistance: -40 degrees Celsius The seal (transparent lid) is not compatible. Heat resistance: 80 degrees Celsius Cold resistance: -30 degrees Celsius The box is quite dirty due to long-term storage. However, the product itself is not dirty. 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 please feel free to comment. Tupperware Japan Tupperware