free sewing tutorial reusable grocery bag tote with square bottom you could put plastic canvas for the sturdy bottom instead of cardboard which wouldn't stand up to washing. You NEED to wash your reusable grocery bags!
Sew Sweetness: Aeroplane Bags - fits the sewing mashine! the Aeroplane Bag PDF sewing pattern, available right now in my pattern shop! This is an intermediate-level pattern, and the instructions are for 2 different sizes (regular and long).