Just part of an article discussing the shortage:
As a result, two of Colorado's largest canning breweries, Oskar Blues Brewery in Longmont and Ska Brewing in Durango, are planning an unusual shift. They will begin wrapping previously printed cans in new labels.
"For many reasons, such as old inventory, misprints or errors in forecasting, millions of aluminum cans go unused each year," Ska writes. "Beginning this week, Ska fans will notice a new look on some of their favorite brews, and for a brewery known for a strong graphic focus on its packaging, it might come as a bit of a surprise."