Today, such home conveniences are often multi-purpose. Refrigerators chill and freeze, protect the oversized and the delicate, and dispense and alert. Mattresses retain our handprints, but won't touch a drop of our wine. Our bathroom taps cough up hot water from the get-go (if that's what we choose) and our televisions bring us the local news, play or record a DVD, let us surf the internet, and shut themselves off after we've fallen asleep.
With all of that in mind, our imaginations can wander endlessly into vehicle territory and the ultimate conversion van. Back in the day, a conversion van had reclining seats and a place for your port-o-let pot...thing...ew.