Make a waterproof container for tools , food, etc. out of 3 or 4-inch PVC pipe. Glue a smooth, permanent cap on one end, and keep a threaded removable cap on the other. That way it?s easy to keep tools and other items dry and out of the way. Its easy to bungee cord it to the floor or side of the truck or fasten under the seat. It also fastens really nice to a rollbar.