You know those plastic grocery sacks you keep collection in your kitchen cabinets? Put 'em to use.
# Preheat iron to approximately 300 °F.
# Line work surface with parchment paper.
# Square 4 plastic bags by cutting off handles and bottoms.
# Unfold bags completely and layer on top of each other.
*Note: bags with printing must be turned inside-out.
# Cover bags with parchment paper and begin to iron.
# Melt bags evenly by moving iron continuously.
# Flip bags occasionally and check for unfused areas.
# Repeat to make 5 sheets.
5 sheets of fused plastic
# Cut raw edges to square all sheets.
# Cut a 2-inch square from the bottom corners of two sheets.
# Cut two vertical 2-inch strips from one sheet.
# Overlay a sheet without corners and a full sheet.
# Pin together with a 2-inch seam allowance. Repeat for other sheets.
# Sew each panel across overlap.
# Fold and pin 2-inch strips in half.
# Sew down the middle.
# Measure across top of panel marking 2-inches on either side of center point.
# Align strip ends to marked points and sew a square to secure.
# Align panels and pin together inside-out.
# Sew sides and bottom, leaving corners raw.
# Pinch corners and sew across.
# Turn inside out.