Patent ID: 8109280

Claim:
A device for containing a product, comprising: a plurality of stacked sections pivotable with respect to each other about an axis; and a lid configured to cover one of the sections, wherein the sections are substantially aligned with each other when the device is in a closed position and when the sections are pivoted with respect to each other in a direction transverse to the axis to an opened position, the sections are not aligned with each other, wherein at least one section includes a projection which is received in a semicircular groove formed in an adjacent section, wherein at least one of a depth and a width of the groove gradually changes from a first end of the groove to a second end of the groove, wherein the depth of the groove changes along substantially an entire length of the semicircular groove to thereby increase a resistance created between the projection and the groove from approximately the first end having a first depth to approximately the second end having a shallower depth than the first end, and wherein the projection is moved the length of the semicircular groove from the first end when the sections are in the closed position to the second end when the sections are the opened position.