| 摘要 |
A container is provided that includes an upper chamber defined by upper sidewalls that together define a frusto-tetrahedral shape. Each of the upper sidewalls has an outwardly facing surface and at least one upper hollow pad protruding outwardly from the outwardly facing surface so that the at least one upper hollow pad increases the total enclosed and structural stiffness of the upper chamber. A lower chamber is also included that is defined by lower sidewalls that together form a frusto-tetrahedral shape. Each of the lower sidewalls has an outwardly facing surface and at least one lower hollow pad protruding outwardly from the outwardly facing surface wherein the at least one lower hollow pad increases the total enclosed volume and structural stiffness of the lower chamber. The upper chamber and lower chamber are interconnected by a central chamber defined by sidewalls that are recessed relative to the upper sidewalls and the lower sidewalls.
|
