A retail-ready container includes internal corner supports. The container is erected from a preassembly formed from a single blank. The blank includes a side panel, a bottom panel, and an auxiliary panel. Each of the side panel and the auxiliary panel include a plurality of sections connected by respective fold lines. The auxiliary panel is folded against the side panel and sections of the auxiliary panel are adhered to corresponding sections of the side panel. Fold lines of the side panel are laterally offset from fold lines of the auxiliary panel so that unfolding of the preassembly yields the container with internal corner supports.