Abstract: A box includes an elongated surrounding wall and a plurality of trays. The surrounding wall has a plurality of interconnected vertical wall sections and two distal ends. Each of the vertical wall sections has an inner wall surface. Every two adjacent vertical wall sections are pivotally interconnected along a vertically extending fold line. The surrounding wall is movable between a folded position, wherein the vertical wall sections cooperatively confine an enclosure, and an unfolded position, wherein the distal ends are spaced apart from each other. Each of the trays has a periphery secured to the inner wall surface of a respective one of the vertical wall sections. The trays are superimposed and are disposed in the enclosure when the surrounding wall is in the folded position.