[Features] Stacking and nesting are possible by rotating 180° when stacking and changing the color direction. Storage efficiency is excellent when nesting, and empty box space can be reduced. Layering the same color allows stacking with items inside, and stacking alternate colors allows for nesting, which saves space. Stacking can be done in different colors and shapes, and nesting can be done in the opposite direction. A type that pursues nesting efficiency and saves space during storage.