How-to make a shopping bag out of fused plastic:
*For the small shopping bag you will need 8 fused squares for the body of the bag and two fused rectangles for the handles.
* For the large shopping bag, you will need 12 fused squares for the body of the bag and 4 fused rectangles for the handles.

- Over lap the squares and sew them together using a zig zag stitch. 4 squares for the front. 4 squares for the back. (for the Large shopping bag, six squares for the front and back)
* When you are sewing the plastic together, do not go over the same spot a bunch of times or it will weaken the plastic and make it break.
- Place the front and back together, right sides facing in towards each other and sew a seam down both sides and across the bottom.
- Cut off any excess material on the outside of the seam.
- "Square" the bottom of the bag by creating a triangle with the two corners, sewing a zig zap stitch from on side to the other and cutting off the excess.
- Turn the bag right side out.
- Fold the the top of the bag in to create a simple hem and sew it down using a zig zag stitch.
- For the handles, take one of your rectangles and fold the two sides inward. Then sew a zig zag stitch down both sides. Repeat with rectangle 2 for the second handle. (for the large shopping bag, sew to rectangles together at the ends then proceed with folding and sewing)
- Attach one to the front and one to the back as shown.

And you have a reusable shopping bag!! 

Bag Pattern