April 2/Purchase, N.Y. -- AMP Energy and racing superstar Dale Earnhardt Jr. announced the debut of a new sour grape flavor, Dale Jr. Sour, available for a limited time at participating 7-Eleven stores across the country starting on April 2.

Dale Jr. chose the new sour grape flavor for this limited edition AMP Energy product, which features him and his No. 88 Chevrolet SS on the can. "Selecting the great tasting sour grape flavor for AMP Energy was a fun experience," said Earnhardt. "I'm excited for my fans to try it and to hear what they think."