I used a water saving toilet in a holiday shack with a handbasin on the top which drained into the cistern below so the water got reused. Interesting idea but n

I used a water saving toilet in a holiday shack with a handbasin on the top which drained into the cistern below so the water got reused. Interesting idea but not convincingly useful. It lacked warm water for starters so it is a fairly casual hand wash and the water only ran while the cistern was refilling. As a water saving measure I am more impressed with no-flush or reduced flush urinals and dual flush toilets. Not sure on the hand washing aspect. Is walking a couple of meters to a hand basin really that hard?