This is a collector's item. Each bottle has a serial number.
In 1999, the Boston Beer Company produced Millennium, a single release strong beer with an alcoholic content of 21% by volume (abv). The company followed this up in 2002 with Utopias; at 24% abv, it was marketed as the strongest commercial beer in the world. The company subsequently released new "vintages" of Utopias annually, increasing the alcoholic content to 27% abv by 2007. However, it is no longer the strongest in the world, since several beers have surpassed Utopias in alcoholic content, the record currently being held by Armageddon (65% abv), produced by Brewmeister in Scotland.
Utopias is made with caramel, Vienna, Moravian and Bavarian smoked malts, and four varieties of noble hops: Hallertauer Mittelfrüh, Tettnanger, Spalter, and Saaz hops. The beer is matured in scotch, cognac and port barrels for the better part of a year. A limited number of bottles are released each year; in 2007, only 12,000 bottles were produced, and in 2009, only 9,000 bottles were released. Sold in a ceramic bottle resembling a copper-finished brewing kettle.