| 摘要 |
A symmetrical container of desired cross-sectional polygon configuration having a floor and a plurality of upstanding side walls, at least one side wall having a flange of predetermined dimensions extending a predetermined distance above the upper end of the one side wall, and at least one other side wall having a recess extending below the upper end of the other side wall to define a groove having dimensions at least as great as that of the flange. Two identical containers may then be positioned in inverted relation with the flange of each container mated within the groove of each other container to thereby define a closed housing. |
