That's right. I've experimented knitting Walmart and Safeway bags into a bag/ purse- like with cotton lining (old shirt of mine) inside the bag and strap.
Boring Information Needle Size: 13 Bamboo Number of Walmart/ Safeway Bags: 57 Bags Number of Stitches of Bag: 22 across Number of Stitches of Strap: 5 across Length of Time of Complete: Less than a week