For winter. A radiator running from the engine heats the hot water bottle inside the car, the driver's hot water bottle, and ends at the roof, where it connects to a stove allowing the driver to heat his food while traveling, saving him from having to go to a restaurant, a welcome addition in these high-cost times. For a small fee, the traveler can have a hot drink if he wishes.

For summer. The radiator transforms into an ice cooler... the roof is covered with an oilcloth imitating a tablecloth.