SELF-CENTERING FEATURES FOR STACKABLE CONTAINERS

A container includes a polygonal section comprising lateral walls surrounding an interior space. An upper wall forms a top bound on the interior space. A lower wall forms a bottom bound on the interior space. An alignment tab straddles a respective one of the upper fold lines. The alignment tab also has an intermediate fold line between the first and second ends of the alignment tab that is closer to the first end than to the second end, such that the alignment tab projects upward from the upper wall and separates two vertical, inward facing alignment edges at an upper end of the adjacent one of the lateral walls. A retention tab extends downward from the adjacent one of the lateral walls and is configured to engage two vertical, inward facing alignment edges of a similar container for alignment in a stack.