Cold Activated Can. Blue Mountain, Cold Beer. It doesn’t get colder than this When the mountains turn blue, it?s as cold as the Rockies. Cold Lagered Below freezing to give our beer its crisp taste. Cold Filtered For a bright appearance. Cold Packaged At the peak of freshness Coors Light, the World’s Most Refreshing Beer, is the fourth best-selling beer in the U.S. Introduced in 1978, Coors Light has been a favorite in delivering the ultimate in cold refreshment for more than 25 years.