When Andy Warhol first told the Absolut vodka company that he admired the design of their bottle, and wanted to paint it, no one suspected that a Swedish booze company would become the subject of one of the most widely-viewed pop art collections of all time. But 25 years and countless Absolut ads later, the collection is taken quite seriously not just as a successful ad campaign, but as a legitimate collaboration between commerce and art. Oh, and in case you ever wondered: yes, the campaign sold a heck of a lot of vodka over the years.