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Most people have dirty feeling about stagnant water, so they keep turn on the water and wash. But if people always turn on the water, then lots of water is wasted. Oasis is inspired by small perforated water balloon, so basin’s depth is changeable. Also its drainage hole size increase when basin’s depth becomes deeper. As a result, when user turns on the water and fill the basin, firstly basin keeps sinking, but at some point, drainage is enough to cover income water, basin maintains equilibrium of water supply. Because of these features, user can control the amount of water use and wash without dirty feeling. So it can save the water.
Ulsan, South Korea