Patent ID: 8157123

Claim:
A container comprising: a base having a continuous base bottom with a central axis and a base wall extending from the base bottom upward from a base wall bottom to a base wall top and including at the base wall top a first closure portion of generally U-channel configuration having an inner wall closest to the central axis and a spaced-apart outer wall furthest from the central axis and a first intermediate wall connecting the inner wall and the outer wall, the inner wall including a generally ridged portion defined by a first upper cutback portion and a second lower cutback portion, the base and first closure portion being formed as a single piece, wherein the first cutback portion and the second cutback portion are arranged vertically adjacent to each other such that extending from top to bottom a first upper leg of the first cutback portion directed downward towards the outer wall intersects a second lower leg of the first cutback portion directed downward away from the outer wall to create a first ridge directed towards the outer wall and a third upper leg of the second cutback portion directed downward towards the outer wall intersects a lower forth leg of the second cutback portion directed downward away for the outer wall to create a second ridge directed towards the outer wall; and a cover including a second closure portion of generally U-channel configuration having an inner wall and a spaced-apart outer wall and a first intermediate wall connecting the inner wall and the outer wall, the inner wall including a generally ridged portion defined by a third cutback portion and an optional forth cutback portion and the second closure portion engageable with the first closure portion to releasably attach the cover to the base, wherein the outer wall of the second closure portion extends downward from the first intermediate wall to form a first angled leg extending downwardly and inwardly towards the inner wall and the bottom of first angled leg protrudes outward forming a first outward step where the outer wall extends downward to form a second angled leg extending downwardly and inwardly towards the inner wall and the bottom of the second angled leg protrudes outward forming a flange.