Patent ID: 7537119

Claim:
A container assembly, comprising: a lid portion including a plurality of first raised members each projecting outwardly from an upper surface and arranged substantially in a first desired direction, the lid portion further including a plurality of first ribs projecting outwardly from the upper surface, each of the plurality of first ribs extending continuously between adjacently located first raised members and oriented along the first desired direction, at least some of the first raised members and first ribs cooperatively forming a plurality of first receiving areas, wherein the plurality of first raised members project outwardly by an amount that is greater than the outward projection of the plurality of first ribs relative to the upper surface; and a base portion coupleable to the lid portion and forming a containment space, the base portion including a plurality of second raised members each projecting outwardly from a lower surface and arranged substantially in a second desired direction, the base portion further including a plurality of second ribs projecting outwardly from the lower surface, each of the plurality of second ribs extending continuously between adjacently located second raised members and oriented along the second desired direction, at least some of the second raised members and second ribs cooperatively forming a plurality of second receiving areas, wherein the plurality of second raised members project outwardly by an amount that is greater than the outward projection of the plurality of second ribs relative to the lower surface, the second receiving areas configured to complementarily engage an identical container assembly positioned below the lower surface, and the first receiving areas configured to complementarily engage another identical container assembly positioned above the upper surface.