The Mindful Water System encourages responsible water use. It has two sinks: One for toxic "black water" that goes out to the sewers, and one for "grey water" that is reused in the dishwasher or to water the plants above the sink.
Read more: http://www.businessinsider.com/ikea-created-kitchen-2025-no-stove-or-refrigerator-2015-7#ixzz3j8d9Iged