Last summer I left a trail of gasoline through the dry woods because the bungee holding my spare gas can to the sidecar step broke and the can slid down where it could rub on the tire. I needed a better way to haul fluids. RotoPax are stupid expensive, but made of rugged, thick walled plastic with a secure mounting system, they seem to be up to the task. I added mounts to either side of the sidecar trunk, putting the weight where it will add to the rig’s stability. Problem solved.