It is a "breathing bento box" that is lacquered with light and pleasant Kyushu cedar wood. It has the properties of humidity control and heat insulation, and can keep rice delicious. Lacquer prevents color and odor transfer, so you can put any side dish, such as oily or dark-colored items. It can be washed with detergent and dries quickly, making it easy to clean. The height makes it easy to pack side dishes, and it feels like it can fit more than it looks. There are a wide variety of sizes, and I think you can find just the right one in terms of capacity and usage. It is made using a simple traditional technique called "grinding" and keeps costs down with minimal construction without decoration. The adhesive is also a 100% natural material made from lacquer and flour that have been handed down since ancient times.