For the Large Utility Tote from thirty-one: She took a vinyl tablecloth (the kind you can get at Walmart) and some pieces of cardboard. She wrapped the cardboard with the tablecloth and made sides and a bottom. Now her bag stays upright at all times.
Tutorial for making a plastic bag lined trash holder for the car. I have the thought to line the bag with the PUL that I use for diaper covers so that they will not leak anything wet or leaking things and that it will still be washable and instead of pellon, some sort of clear bendable plastic or acrylic.