PURPOSE: To provide a convenient container or dish which can serve for eating outdoors at the time of watching sport, fishing, hiking or the like, for example, when there is no tableware available.

CONSTITUTION: Wall plates are connected via fold lines at four sides of a bottom 1 having a predetermined width, coupling pieces having a diagonal fold line coupled to an end of the wall plate by the fold line is connected to the outside of corners, and further extending pieces are connected via the fold lines to right and left wall plates of a stand-foldable box F constructed in a manner that triangular parts close to left and right wall plates 2, 4 of the coupling piece divided by the diagonal fold line are respectively adhered to predetermined positions on the right and left wall plates, wherein tips of the extending pieces can be locked with each other to provide a handle H.