Yesterday we went to town, 50 kilometres away, so I had a chance to buy material to make the lining of my Tunisian crochet shopping bag. I also bought a very short zip to make a pocket in the lining. This is just making life difficult for myself! The specifications for the bag do say that it should have a pocket inside. They do not say it should be an invisible pocket with a zip. It took me three attempts before it looked anywhere near neat enough.
this tutorial. Then I decided it would be better to make a facing for the opening and fold that inwards. The result is still not super smooth, but I hope that being inside the shopping bag, it won't be under great scrutiny.