Abstract: A stacking container having a bottom and two pairs of opposed side walls, a cover comprising two portions hinged to one pair of opposed side walls, the opposed lateral edges of each cover portion engaging the upper edges of the other pair of opposed side walls of the container when in closed position, the outer free edges of the cover portions meeting, when the cover is in closed position, to present a flat upper surface of the cover. The free edges of the cover portions are crenellated, with a plurality of spaced teeth having recesses therebetween, to interfit one with the other when closed. Each of at least a plurality of teeth and corresponding recesses are configured to interengage when the cover portions are closed to inhibit lateral separation of the cover portions one from the other. Each cover portion is sealable one on each of the other pair of opposed side walls.