Okay so I've looking around for a cool thing to make in large quantities that I can embroider on and sell at conventions.
I've come up with these. This is Kwik Sew pattern #3447 view B. They're lined bags that tie by passing the larger loop through the smaller one. The pattern has three sizes and I made one of each using leftover materials from another project.
I'm planning to make a number of these with steampunk themed fabric to sell at conventions. I can embroider onto the outer surface easily before assembly but once it's assembled embroidering would be difficult.