Originally Posted by canklecat

I'm using an ordinary insulated rolling cooler as a trunk bag - probably cost less than $30. The metal bracket for the telescoping handle fits over the rear rack almost perfectly, and cinches securely with a couple of bungee cords. Seems water resistant, at least - the interior is solid vinyl or something similar, not woven fabric or ballistic nylon like the shell. Holds up to three bags of groceries, or 30 lbs, easily. It would hold my Thinsulate and Gore Tex parka and winter boots, no problem. Or other change of clothes without crumpling - should accommodate carefully folded trousers, shirt, etc., and dress shoes.