When Cycle Brewing Co. opens today, it will be releasing a brand new stout that has been aged in two different types of barrels.

That stout will be Blended DOS, a blend of two imperial stouts that were aged in barrels that previously held Prichard’s rum and Angel’s Envy bourbon, with “zero adjuncts” added.

The DOS base stout—which stands for Doug’s Original Stout—has been released in more than 30 different incarnations since it debuted in 2013, including Rare DOS Double Barrel, an imperial stout aged in bourbon barrels before then being aged again in cinnamon bourbon barrels; Rare DOS 1, an imperial stout aged in whiskey barrels for more than a year; and Double Barrel Vanilla Rare DOS, an imperial stout aged in a bourbon barrel before being aged once again in a vanilla bourbon barrel with vanilla beans added.

According to a post on Cycle’s Facebook page, Blended DOS is packaged in 22-ounce bottles ($25) and is being released at the brewery today. Although production numbers have not been announced, the St. Petersburg, Fla.-based brewery posted that it has “a much more limited quantity than our average release.”