A granular material handling device formed from a sheet of material having a top surface and a bottom surface, the device comprising:
- a rectangular middle panel comprising a central rectangular subpanel hingably joined to a lower rectangular subpanel along a first fold line, and hingably joined to an upper rectangular subpanel along a second fold line;
- a left panel hingably joined to a left edge of the rectangular middle panel along a third fold line and comprising a plurality of left panel facets hingably joined to each other, including a leftward right triangular facet with a short leg and a long leg, the leftward right triangular facet hingably joined to a left edge of the central rectangular panel with the short leg perpendicular to the first fold line, and hingably joined via the leftward right triangle long leg to a leftward adjacent facet at a fourth fold line collinear with the first fold line;
- and
- a right panel hingably joined to a right edge of the rectangular middle panel along a fifth fold line and comprising a plurality of right panel facets hingably joined to each other, including a rightward right triangular facet with a short leg and a long leg, the rightward right triangular facet hingably joined to a right edge of the central rectangular panel with the short leg perpendicular to the first fold line, and hingably joined via the rightward right triangle long leg to a rightward adjacent facet at a sixth fold line collinear with the first fold line;
- wherein:
- the lower rectangular subpanel and upper rectangular subpanel are pivotable with respect to the central subpanel along the respective first and second fold lines so as to orient the upper and lower rectangular subpanels to an opposed position forming an enclosed cavity;
- the left panel facets are pivotable with respect to each other so as to position the long leg of the leftward right triangular facet perpendicular to the central rectangular panel and define a left end of the enclosed cavity, and to position a remainder of the plurality of left panel facets within the enclosed cavity;
- the right panel facets are pivotable with respect to each other so as to position the long leg of the rightward right triangular facet perpendicular to the central rectangular panel and define a right end of the enclosed cavity, and to position a remainder of the plurality of right panel facets within the enclosed cavity, thereby placing the device in a closed configuration defining a triangular cross-section shape;
- the first fold line, fourth fold line, and sixth fold line define a longitudinally extending collinear fold line as defined by the device;
- simultaneously, to render the device in a flat configuration, the leftward right triangular facet is foldable 180 degrees with respect to the leftward adjacent facet along the collinear fold line, the central rectangular subpanel is foldable 180 degrees with respect to the lower rectangular subpanel along the collinear fold line, and the rightward right triangular facet is foldable 180 degrees with respect to the rightward adjacent facet along the collinear fold line.