Thank you for viewing. This is a heat-resistant glass storage container from the "PYREX" brand, manufactured by Iwaki Glass (now iwaki). * This is a valuable product that is currently discontinued. * Made of heat-resistant glass, it can be sterilized with boiling water and used in the microwave. (The lid can also be used in the microwave.) * It can also be used as a measuring cup, as it has red markings on the side indicating measurements and capacity (mL/cc) for things like flour and sugar. This is a used item. There are no particularly noticeable scratches or stains, but it has been stored at home for a long time, so we appreciate your understanding.