Waste disposal system having guide features

A cassette for the collection and storage of waste, the cassette comprising:

• a length of film, said length of film defining an interior volume for the collection and storage of waste, the length of film having a first end and a second end;
• a cassette body comprising an inner perimeter, said inner perimeter defines an opening area sized to receive waste, the cassette body having a lower surface portion and a wall in said lower surface portion, said cassette body defines a hollow volume for the storage of said length of film, wherein said length of film is in a pleated or folded configuration within said hollow volume;
• a guide feature at a bottom of the cassette body configured to engage a guide member in a cassette receiving portion of a waste disposal device, the guide feature defined by the wall of the cassette body having an undulated shape extending circumferentially about a full revolution of the opening area in said lower surface portion, the undulated shape defining an alternating sequence of peaks and valleys along the full revolution of the opening area, the peaks sloped toward the inner perimeter;
• wherein the peaks have a widthwise dimension taken along a circumference of the cassette, wherein the widthwise dimension about the inner perimeter of the cassette body is smaller than about an outer perimeter of the cassette body, wherein the peaks have a heightwise dimension about the inner perimeter smaller than about the outer perimeter of the cassette body, and wherein a widthwise and heightwise variance in the peaks and the valleys approach each other up to the inner perimeter;
• and
• wherein said cassette body has an opening defined between the inner perimeter and the outer perimeter on an upper portion of said cassette body, the upper portion opposite to the bottom of the cassette body, the opening permitting dispensation of said length of film upwardly out of said hollow volume and downwardly through said opening area.