Patent ID: 8474622

Claim:
A system for stacking bulk material containers, said system including: a first bulk material container having at least one container wall, wherein said at least one container wall includes a projection projecting inwardly from the interior of said container wall; and a second bulk material container having at least one container wall, wherein said at least one container wall includes a vertical stop positioned on the exterior of said at least one container wall, wherein, when said second bulk material container is introduced into said first bulk material container to stack said second bulk material container in said fist bulk material container, the downward movement of said second bulk material container into said first bulk material container is stopped by said vertical stop coming into contact with said projection so that the exterior of the bottom of said second bulk material container is suspended away from the interior of the bottom of said first bulk material container, wherein said projection is one of a series of projections and recesses in said interior of said container wall, wherein said vertical stop is positioned in a recess on the exterior of said at least one container wall.