I am selling this item to organize my collection. This is a gratin dish made of heat-resistant milk glass, manufactured by the French company ARC, and was distributed in 1999 (Heisei 11) as part of a collaboration with Mister Donut. It's similar to the milk glass bowls given away in Yamazaki's Spring Bread Festival. Among various milk glass items, this one is a less common light blue color, and it would likely add a touch of color to your dining table as everyday tableware. As it is made of heat-resistant tempered glass, you can use it directly in the oven or microwave. It is not brand new and unused, and as the photos show, there are some signs of use, although there are no cracks or chips. If you like it, how about adding this milk glass dish to your collection?