Drinking the Chicago River water would be healthier.
(click image, via) Leo Burnett and McDonald's jumped on the annual Chi-town tradition of dying the city's river green for St. Patrick's Day with this impressive ambient stunt. What, exactly, is in a Shamrock Shake has of course long been a point of speculation/disgust. Previously in BIG ambient ad stunts:
• Alfa Romeo.
• Hubba Bubba Bubblegum.
• Giant cleaver train crossing warning.