A Cactus. Can it survive hostile environments thanks to its soft waxy skin?
Yup, the C4 Cactus has a unique solution to the biffs of hard urban life. The outside is bubble-wrapped. Or more precisely it has 'Airbumps', oval pads of air embedded in sheets of a soft but high-tech and durable plastic. If an errant supermarket trolley or the door of the adjacent car nerfs the side of the Cactus, it will simply bounce off.
And a Cactus can survive on very little fluid?
Indeed. There's a diesel that rates at better than 90mpg. Even this handy turbo petrol one manages better than 60, for 105g/km. That's partly because of newly developed engines, but also because it's sensationally light – some models under a tonne. And the turbo I'm driving only 1020kg. It weighs less than a Fiesta, but is the size of a Focus.