A couple of years ago in Apalachicola, FL we met a sailor who who made bags (very strong) like those above mentioned using scrap sail, biminni and other
canvas scraps,they were very nice looking and useful. He used different color combinations and sizes. He gave one to my wife it is one of her favorites. I think he had made over a thousand over the years and either gave them away or donated them for fundraisers.
Steve