Previously, I worked with a manufacturer and received a lot of products. Currently, they are sold on Rakuten for ¥18,000 per box. I opened two boxes to check the products. One box is missing the instruction manual. You can heat them up right before eating, up to 70 degrees Celsius. Individual sales are also possible (please inquire). ¥1,800 per piece (including shipping). https://item.rakuten.co.jp/furarian/coopvgtxr256ayajanchzcaory/