Abstract: A box construction including a bottom, and a pair of end walls extend upwardly from opposed edges of the bottom. A side wall extends upwardly from the bottom and connects corresponding ends of the end walls, while a second side wall is hinged to the bottom and can be pivoted between an open position, where it is generally flush with the bottom, to a closed position where it connects corresponding ends of the end walls. Each end wall is formed with an inner section and an outer section and the ends of the hinged side wall are formed with inwardly extending flaps that lie in common planes with the inner section of the corresponding end walls when the hinged side wall is in the closed position. The inner sections of the end walls and the flaps are formed with mating abutments which releasably lock the hinged side wall in the closed position.