TheMurderousMisterMero_07-24-2009, 06:24 PMdont use a backpack.its mad suspect.i use like a regular grocery bag,double down.try not to move the cans to much is the best thing.colorplace seems to clack the most.magnets only work if the balls inside the can are metal and usually there not.usually their just marbles...you best bet is maybe wrapping them in a shirt or something like that or maybe a tu