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Number of millions of Americans who drink tea daily, according to the U.S. Tea Association. Ready-to-drink tea now makes up 80 percent of tea consumption. Last year, 288 million pounds of black and green tea—with a wholesale value of $12 billion– were imported into the U.S. “Energy” teas (like guarana tea) and “calming” teas (like valerian tea) are surging in popularity.