How to make a bike pannier out of a rice bag.
Step 1: Get Your Materials
A rice bag, or other bag
Pliers (needle nose)
A mandrel about the diameter of your bike rack frame (this can be anything that you can bend metal around)
Step 2: Bending
Bend your metal pieces (I used the metal port covers from an old PC) so that they're hooked with an internal diameter about the same as the size of your bike rack.
Step 3: Placement
Place your clips no further apart than your bike rack can support, and zip tie them to the bag. I used the smallest zip ties I could find, and doubled them for extra strength.
Step 4: And You're Done!
Go get some groceries! Your bag is done!