Okay, these aren't the most fashionable panniers, but they hold a ton and they're super cheap and easy to make. What you'll need: 2 small rectangular plastic wastebaskets (found just about anywhere, including thrift shops...
Follow this instructable to make great bicycle storage from a backpack, without ruining your bag. Materials: backpack webbing, or fabric that you really trust. Webbing is everywhere, though. You could even trim a little off...
Increase your on-bike storage by scads with this easy sewing project. MaterialsPackcloth: 1 yardLightweight fabric (as noted above): 1.5 yards1 inch flat weave nylon webbing: 10 yardsGross grain ribbon or additional webbing: 78 inches or 2.5...