This product can be used as a lid for shelf containers, and as a rack for shelf containers and cooler boxes. In order to achieve both lid and rack functionality, the groove shape, leg shape, and assembly method have been devised to allow the Shelf Container 25 to be used whether it is open or closed, while the groove for the second leg is simplified. The groove on the short side is not only designed to fit the legs of the shelf container and lid rack when stacked, but also serves as reinforcement to increase the strength of the product. On the other hand, the groove on the long side serves as product reinforcement.
