Cut up an old skirt or dress, I find lots of lightweight denim dresses at the thrift shop. Pin one of the pocket panels that you just made onto this lightweight denim and cut out, repeat with other pocket panel. Stitch around all 4 sides. This will strengthen the bag and make it more durable. Place front and back of bag right sides together, pin. Sew sides and bottom of bag with 1/2" seam allowance. To make the bag 3 dimensional, open up and flatten the side seam down, laying it against the bottom seam. Stitch across the corner. Repeat to the other side and clip corners. Turn right side out.