A friend had a portable fuel tank/caddy. It had very strong loops on top of the container that he had heavy clevises in. He would put the tank on his pickup and fill it. Back into the barn and hook it into a block and tackle, pick it up about 6', and pull the truck out. He could pull tractors or what ever in and it had a handle with a trigger, and gravity filled the tank. I saw another one at a farm auction and it went for more than I had that day. I've looked for one on line and can't find one. I called them tanks, caddies, containers, and have found nothing quite like it. What would you call it? my friends held 30 gallons.