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1) A type of deep sink or washbasin is named after which city in the United Kingdom?
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2) A tap which drips once per second can waste how many gallons of water over a year?
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3) Which character in "The Big Bang Theory" invented a space toilet?
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4) Bathroom towels originated in which Mediterranean country?
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5) Where is the "Hotel de Glace" ice hotel in which the bathroom facilities are in heated trailers?
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6) The world's largest public toilet facility in Chongqing, China has how many toilets?
