Disposable liner for an animal litter box

A litter box system comprising:

• a litter box for an animal;
• and
• a disposable liner for lining the litter box, the disposable liner comprising:
• a planar base sheet comprising a first end edge, a second end edge opposite the first end edge, a first seam edge, and a second seam edge opposite the first seam edge, the first seam edge and the second seam edge extending between the first end edge and the second end edge, the base sheet having a flat, rectangular shape defined by the first and second seam edges and the first and second end edges;
• a first end wall coupled to the base sheet at the first seam edge, the first end wall comprising a first gusset integrally formed with the first end wall;
• a second end wall coupled to the base sheet at the second seam edge, the second end wall comprising a second gusset integrally formed with the second end wall;
• and
• a flap portion comprising an elastic band for securing the liner on the litter box, the flap portion extending along the first end wall and the second end wall and defining a top edge of the liner, wherein the first gusset extends from the first seam edge to the flap portion and the second gusset extends from the second seam edge to the flap portion.

A method for forming a disposable liner for a litter box comprising:

• providing a liner material in a first configuration, the liner material including a first panel coupled to a second panel along a base edge, wherein, in the first configuration, a first gusset extends along a first end of the liner material and a second gusset extends along a second, opposed end of the liner material;
• folding the liner material from the first configuration into a second configuration in which the first gusset and the second gusset are substantially aligned with one another and with the base edge;
• removing a first corner portion of the material to form a first seam edge by cutting the first corner portion substantially perpendicular to the first gusset;
• sealing the first seam edge;
• removing a second corner portion of the material opposite the first corner portion to form a second seam edge by cutting the second corner portion substantially perpendicular to the second gusset;
• and
• sealing the second seam edge.