the bottom in addition to gusset panels 61 and 63 being permanently welded along their trapezoidal side edges 1 2 and 6 1 on one side and 3 4 and 4 5 on the other the panels 61 and 63 are disruptably bonded along the same weld line made at one and the same time each weld line is made diagonally to extend from the bottom edge of each gusset panel 61 and 63 to adjacent the bottom of the side seam weld line of panels 41 and 41 39 on either side the disruptable bond must be broken to provide the gusseted bottom and this is easily done when a pot is inserted in the container as explained above the weak bond between treated and printed outer surfaces is formed because the effectiveness of the heat seal between untreated surfaces is vitiated by the treated or printed outer surfaces the area of the gusset formed is chosen such that the gusset lies flat against a planar surface when the pot in the container is placed on the surface and triangular portions of the gusset are pressed against the lower portion of the pot on one side a triangular portion is defined by the area obtained by connecting points 1 2 6 and on the other side the area obtained by connecting points 3 4 5 the area of gusset 60 is therefore related to the dimensions of the frustoconical pot which is to be sheathed and for a snug fit around.