A workpiece container stores at least one workpiece having a bottom surface and a peripheral edge. In one embodiment, a workpiece support structure is located within the container enclosure, which forms multiple vertically stacked storage shelves within the enclosure. Each storage shelf includes, in one embodiment, a first tine and a second tine for supporting the workpiece in a substantially horizontal orientation. The bottom surface and peripheral edge of a workpiece seated on a storage shelf extends beyond the outer edge of both the first tine and the second tine. An end effector may engage these extended portions or “grip zones” of the workpiece.