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Claim 1

A COLLAPSIBLE CYLINDRICAL CONTAINER COMPRISING, IN ERECTED CONDITION, TWO SIDE WALL FORMING PANELS INTEGRALLY CONNECTED TO EACH OTHER ON VERTICALLY EXTENDING HINGE FORMING CREASE LINES SO AS TO DEFINE A TUBULAR BODY OF GENERALLY CYLINDRICAL FORM, AN INNER BOTTOM WALL FORMING PANEL HAVING SIX STRAIGHT EDGES OF EQUAL LENGTH ON THE PERIMETER THEREOF AND WITH A MAXIMUM DIMENSION ACROSS ITS INSIDE FACE SOMEWHAT GREATER THAN THE DIAMETER OF THE TUBULAR BODY, SAID INNER BOTTOM WALL FORMING PANEL BEING HINGED ALONG ONE STRAIGHT EDGE THEREOF TO THE BOTTOM EDGE OF A WEB SECTION WHICH EXTENDS UPWARDLY IN THE LOWER MARGIN OF THE BODY SIDE WALL AND WHICH IS DEFINED BY AN UPWARDLY BOWED, SEMI-CIRCULAR FOLD LINE AND A CHORD-LIKE BOTTOM STRAIGHT EDGE, SAID WEB SECTION HAVING A SUBSTANTIALLY FLAT SURFACE ADJACENT THE BOTTOM EDGE THEREOF AND MERGING INTO THE CURVED SURFACE OF THE BODY SIDE WALL ALONG THE UPPER EDGE THEREOF, PAIRS OF BOTTOM WALL FORMING FLAPS INTEGRALLY CONNECTED ALONG STRAIGHT EDGES THEREOF TO THE STRAIGHT BOTTOM EDGES OF LIKE WEB SECTIONS IN THE BOTTOM MARGIN OF THE SIDE WALL AT OPPOSITE SIDES OF THE HINGED CONNECTION BETWEEN SAID INNER BOTTOM WALL FORMING PANEL AND SAID SIDE WALL, THE FLAPS OF SAID RESPECTIVE PAIRS BEING HINGED TO EACH OTHER BY A GLUE TAB WHICH IS FLEXIBLY CONNECTED TO ONE THEREOF SO AS TO ASSUME HORIZONTAL COPLANAR RELATION WHEN SAID CONTAINER IS ERECTED, AND A FURTHER BOTTOM WALL FORMING PANEL INTEGRALLY HINGED TO THE BOTTOM EDGE OF A WEB SECTION DISPOSED IN THE BOTTOM MARGIN OF SAID SIDE WALL OPPOSITE THE FIRST MENTIONED WEB SECTION, SAID FURTHER BOTTOM WALL FORMING PANEL HAVING A GLUE FLAP INTEGRALLY HINGED THERETO, WHICH GLUE FLAP IS SECURED TO THE OUTSIDE FACE OF SAID INNER BOTTOM WALL PANEL AND ACTS TO SWING THE LATTER TOWARD SAID FIRST MENTIONED FLAPS AS THEY APPROACH SAID COPLANAR RELATION.