According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Allagash Brewing Co. is working on Coolship Red 2018, a 6.7 percent ABV wild ale that is aged in French oak wine barrels for over two years before being conditioned on raspberries. The sour beer debuted in 2011 and was released twice last year in April and August, although both releases came in at a slightly lower 6.2 percent ABV.

A koelschip—or coolship, as it is more commonly known in America— is a large, shallow steel pan about a foot deep that is used to both cool down wort after it is brewed and to expose the resulting concoction to naturally occurring yeasts and bacteria that are in the air. A number of U.S.-based breweries incorporate coolship beers into their lineups, including Jester King Brewery, Allagash and The Collective Brewing Project.

As with past releases, Coolship Red 2018 will be packaged in 375ml bottles.

An email sent to the brewery for additional release and brewing information was not immediately returned.