| 摘要 |
A container system that includes a container portion having a base that defines a perimeter and a wall having a first end that is attached to the base, wherein the wall extends from the first end so that the base and the wall define an interior volume of space and wherein a second end of the wall defines an edge of an opening into the interior volume of space. The container system further including a cover having a surface that is positioned to contact the edge and block the opening, wherein the surface includes a pattern of perforations that defines a weakened area of the surface that is surrounded by the pattern of perforations. |
