Stackable knock-down box

A stackable knock down box comprising a base including a base panel supported on a plurality of pedestals, a plurality of side wall panels, hinge means connecting the side wall panels together to define a composite side wall enclosure, the hinge means being adapted to enable the side wall panels to be folded into a stack, and a plurality of base clip arrangements for releasably holding the composite side wall enclosure to the base in both its erected and folded conditions, the knock down box being stackable in both the erected and folded conditions, and including upper panel auto-alignment and box support means provided along the operatively top edges of the side wall panels, and complemental lower panel auto-alignment means provided on the base, with the upper panel auto-alignment and box support means of a subjacent box being arranged to interengage with and to nest within the lower panel auto-alignment means of a superjacent box when the erected boxes are stacked on top of one another, wherein the upper panel auto-alignment and box support means comprises a plurality of panel converging formations, each formation being formed with a contact face which slopes downwardly and outwardly, and being located towards the outer corners of the composite side wall, and the lower panel auto-alignment means includes complemental corner stabilizing recesses on the pedestals, each of the recesses comprising corresponding overhanging corner contact faces which slope upwardly and inwardly and adjoin recessed outwardly facing perpendicular corner faces such that interengagement of the converging formations and the corner stabilizing recesses results in the upper edge corners of the side walls of an underlying box being converged inwardly into firm nesting and aligned interengagement with the complemental corner stabilizing recesses on the pedestals of an overlying box, wherein the plurality of panel converging formations including reinforcing inserts defining the downwardly and outwardly angled contact faces, and the corner-stabilizing recesses include corresponding reinforcing inserts defining the overhanging corner contact face.