FILE - In this March 3, 2010 file photo, a Costco customer pours a Diet Coke drink at Costco in Mountain View, Calif. A study by Beverage Digest released Thursday March 17, 2011 reports that Diet Coke... more 
FILE - In this March 3, 2010 file photo, a Costco customer pours a Diet Coke drink at Costco in Mountain View, Calif. A study by Beverage Digest released Thursday March 17, 2011 reports that Diet Coke has beat out rival Pepsi-Cola for the first time to become the second-most popular soft drink in the country. less 
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Associated Press | Photo By Paul Sakuma, File
Thu, Mar 17, 2011 6:09 PM EDT