Our Hidden Water Use We use a lot of water to make many ( 1 ) foods and drinks. For example, to make just one cup of tea, 30 liters (about eight gallons) of water are needed! Farmers use most of that water for ( 2 ) the tea plant. Here are some other examples: To get a ( 3 ) of chocolate, farmers use 24,000 liters of water. To get a kilogram of ( 4 ) , farmers use about 14,000 ( 5 ) of water. To get a kilogram of ( 6 ) , farmers use 3,400 liters of water. Today 21% of the world ’ s water ( 7 ) t