RUTHERFORD, Calif.--(BUSINESS WIRE)--Mumm Napa, one of California’s top sparkling wine houses, is now the official sparkling wine of the America’s Cup Summer of Racing in San Francisco. From the opening ceremonies on July 4th through the final races in September, Mumm Napa sparkling wines will be on hand to toast one of the world’s most prestigious sporting events in true Napa Valley style. “Celebrating victory with a toast is a tradition that dates back nearly as far as the America’s Cup itself and we’re happy to be raising our glasses with Mumm Napa.”