Toyota Prius Hybrid Sleeper [Video]
It’s actually a tent called the Habitent, which is fitted to the open rear hatch of the current generation Prius, turning it into a mini-motorhome (RV). It gives you about enough space to turn around, but not much else. We really fail to see its utility and for its €70 ($90) asking price, we’re sure you can find a good tent to erect next to your car, which doesn’t necessarily have to be a Prius.
If you’re still interested, the linked video tries to demonstrate its utility, though we aren’t fully convinced.