Originally Posted by
pdlamb
I don't know about a pannier, but I've tried the "stack all the stuff on end" theory on a handlebar bag. It doesn't work for me. Somehow everything rotates while riding, so I end up with a "layer cake" with heavier things like cell phone and wallet laying flat on the bottom.
I tried a small cardboard box in my handlebar bag to help hold things verticle, worked. Changed that to Coroplast which holds shape when wet. The Coroplast is white.