From FlipAndTumble.com comes the 24/7 reusable eco bag. It’s developed for groceries as a way to carry a big bag in a very small space, then transform it into a shopping bag to not waste plastic bags. I think this bag has very cool travel potential as well. Pack it up and fit it into a shoe or some tight space, then when travelling, it can be used as a laundry bag, grocery bag, day bag, or just about anything. I would encourage you to check out their site and watch the video of this being folded up…sort of like a sock.