This reminds me of a real-world observation, from long ago and at an airport I can't remember. I was sitting in my seat in an airliner, I believe at an intermediate stop on the way to my destination. Watching out the window from my seat I saw a tug with an attached line of covered carts snake up beside the aircraft. The driver got out and opened the sides of the carts - can't remember how many, but more than one. Apparently they only had one side that opened (covered by a tarp of some kind if I remember correctly), and it faced away from the aircraft.
He proceeded to take can