(image) combined toilet/sink
Combined Toilet and Sink
Combining the sink and the toilet in this way has a number of environmental advantages.
Waste reduction: the 'grey' (dirty water) from the sink can be used to flush the toilet, which vastly reduces the amount of fresh water needed.
Materials reduction: combining the products also means that less material will be used and may even mean that less energy is used during production.
Educating the user: this design also reminds the user that water is a a resource that can easily be reused, if intelligent design is applied.
Unfortunately it appears that they are not allowed in the UK because of water regulations!