First, cut a 3 1/2-inch-square garage door opening in one of the container's flat sides with a craft knife. Glue construction paper roof shingles around the top of the jug. Next, add a business sign, made out of construction paper and hung on a toothpick. Poke the toothpick into the jug just above the garage door.
To make a floor, set the jug on a piece of cardboard and trace around the base. Trim the edges so it will slide easily through the doorway. Decorate by gluing on construction paper tiles.
Glue on a construction paper fuel pump and air hose by poking a hole in the side of the jug and tying on a piece of string. A thread-spool car lift finishes of the interior.