Abstract: A reinforced, collapsible, reuseable bulk carton container. The container includes a first pair of opposite side walls and a second pair of opposite side walls. The walls are hingedly interconnected along their lateral upright edges. The first pair of walls are foldable along upright score lines, intermediate their opposite edges, so that the second pair of walls are movable from an open, spaced apart condition to a closed, closely adjacent condition. A bottom wall is hingedly interconnected to the lower edge of one of the second pair of walls and a rigid reinforcing frame is fixed to the underside of the bottom wall. The frame is characterized by a plurality of rigid frame members which are secured to the entire perimeter of the bottom wall to provide a particularly strong reinforcement for the bottom wall. Preferably, upright rigid members are secured to the walls at the four corners of the container to provide for upright rigidifying support for the container.