Another Eco Toilet idea – it makes complete sense to flush the chain with the water from your washing machine. Would this work for you? washing machine next to toilet, collect water ,flush with a bucket!
Caroma Toilet Sink, Integrated hand basin for enhanced water savings. After flushing, fresh cold water is directed through the faucet for hand washing and drains into the tank to be used for the next flush.
The Small House Catalog: toilet/sink combo, a space saver and if you didn't want to use it there's always the kitchen sink a few steps away; could be used in a skoolie, bus conversion, or trailer to save space and recycle sink water into the toilet…
These clever people are using shipping containers, dumpsters and rubbish skips to create family pools at low cost. And you can take them with you if you move! Here are the pools they made --> theownerbuilderne.