This undated image provided by Hellman's shows a 1949 advertisement for Hellmann's mayonnaise. Hellman's turns 100 in 2013 and to celebrate the anniversary, owner Unilever Food is launc

 

              This undated image provided by Hellman
This undated image provided by Hellman's shows a 1949 advertisement for Hellmann's mayonnaise. Hellman's turns 100 in 2013 and to celebrate the anniversary, owner Unilever Food is launching a marketing campaign including a Facebook page and YouTube videos featuring chef Mario Batali cooking up his favorite Hellman's recipes, a smartphone app and a June event featuring the world's largest picnic table. (AP Photo/Hellman's)