Improvised Garden Pot Using a Carboy

For a long time, I've been searching for a rectangular garden pot that would be appropriate near the wall of our driveway. The driveway surface is mostly pebble-washed concrete and we don't have a plant box near the wall.

Why rectangular? Well because the pot will be located just beside the wall so having the pot abut the driveway wall would be nice. I have a tall trellis mounted on the wall so the pot will be semi-permanently positioned there. Since the wall trellis is quite large, I'm expecting a robust vine to climb over it. For a large vine, I would definitely need a big pot.