According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Modern Times Beer and J. Wakefield Brewing are joining forces on Jamaican Rum Barrel-Aged Suggestion of Mass Imperial Stout, an 11 percent ABV imperial stout aged in Jamaican rum barrels with Mexican vanilla that will be packaged in 500ml bottles.

The two breweries have collaborated before, most notably on Suggestion of Mass, an 11.3 percent ABV imperial stout brewed with coconut, coffee from Black House Coffee and vanilla that was released in 16-ounce cans last year.

While the details of Modern Times’ 2019 League of Partygoers & Elegant People membership club shows a beer named Suggestion of Mass Aged in Bourbon Barrels as an available option for members, the version aged in rum barrels is not listed.

An email sent to both breweries for additional information was not immediately returned.