Patent ID: 8186776

Claim:
A storage shell comprising: a plurality of sidewalls each extending between two others of the plurality of sidewalls to collectively define a chamber therebetween, the plurality of sidewalls including a first sidewall defining: a substantially planar panel defining an outer perimeter edge, an exterior surface, and a plurality of holes extending through the substantially planar panel and positioned near the outer perimeter edge, and a track coupled to the substantially planar panel, the track comprising: a first rib positioned just inside and spaced from the outer perimeter edge of the substantially planar panel, the first rib extending from the exterior surface in a first direction away from the chamber, and a second rib concentric with and shaped similarly to the first rib and positioned further away from the outer perimeter edge than the first rib, the second rib extending from the exterior surface in the first direction away from the chamber, wherein the first rib borders each one of the plurality of holes, and the second rib separately borders each one of the plurality of holes, wherein each of the plurality of holes is formed between the first rib and the second rib.