Originally Posted by n4zou
1/2" PVC pipe fabricated to hold a standard backpack to your standard rear rack. Backpack cost me $1 at a yard sale, PVC pipe, glue, and fittings $5, Velcro straps to hold pipe frame to rack $2.95.
Call me vain, but I'm willing to pay a little more for the improved aesthetics. That thing looks like you're headed to a plumbers convention.