If you watch the Simpsons then you know all about Duff Beer. The seemingly only beer in Springfield is officially a real product but with a slight change to the formula. This Duff Beer re-creation takes the alcohol out of the equation and replaces it with an energy formula.
Getting clearance to produce something as famous as Duff Beer is not the easiest thing to do, and originally the beer was only produced and sold at Universal Studios. Now however, the beer is being mass-produced and sold in either single 12 oz cans or 24 packs for those that crave the smooth taste of Duff.
The only thing missing from this amazing pop culture marketing campaign is the original Duffman handing out the beers in his signature frat boy-styled voice.