- Two layers stacked (both inward and outward) Quick case that can be fixed on both
- When moving, the lid is stored with the lid facing inward to prevent the lid from opening and dropping the contents
- The size is set so that the large tide receiving rubber fits snugly while adopting a thin type that does not get in the way
- Stacked neatly for convenient stacking.
- Hinge parts on the side of the main unit are removable, and even one can be used