I follow a channel called "thejasonofalltrades" on YouTube - he's an American who does outdoorsy type sewing videos. He recently posted one where he made a simple pouch out of some material he'd had printed, and mentioned that he'd like to make a lined one but hasn't figured out how to do it. Various people responded saying he could use some sort of binder for the raw edges but I replied that you could make a lined pouch with no raw edges at all. He challenged me to make a video on it and here it is: