That works of course but that is also why toilets were located far away from the house, outside and at the other end of the garden. At least, outside. I would think that the most interesting picture is the one of the outside toilet box. If you are unlucky to still live in a city, you'll certainly be using any kind of small container that you throw out of the window in the morning. Cities will smell nice again and you'll better walk in the center of the streets
. About alternatives, there is another very good one invented by a German. Just take the water you use to wash youself, the dishes and your clothes, put it into a tank and then use it for your toilet. After all what is the point of using clean drinkable water to flush the toilets (no chance you'll do that in T2K).