Upcycled flat-bottomed drawstring bike pannier liner bags
I bought new bike panniers in July. Unlike my previous panniers, these panniers are open at the top. Unfortunately, that meant that my groceries could bounce out whenever I biked over a bump. I considered buying closed-top panniers, but they were all either synthetic or too expensive for my budget. In order to solve the problem of stuff falling out, I decided to make drawstring bags to put inside each pannier. I could secure my stuff by pulling the drawstring. Then, I could tie the drawstring to the inner metal supports of the pannier so that even a light load wouldn't bounce out. I would make the bags flat-bottomed. That way, they would fit well into the flat-bottomed panniers, and it would be easier to put groceries and other stuff into them.
The liner bags are working well! As I write this, I've used them for a little more than a month.