A new packaging option for a variant of AleSmith Brewing Co.’s most popular stout may be on the way.

According to labels filed with the Alcohol and Tobacco Tax and Trade Bureau’s (TTB), the San Diego-based brewery is working on releasing 330ml bottles of Barrel-Aged Speedway Stout, a 13 percent ABV Russian imperial stout brewed with coffee and aged in bourbon barrels for “an extended period of time.”

The barrel-aged stout has historically been packaged in 750ml bottles and is one of more than 60 different variants that use AleSmith’s Speedway Stout as its base.

In addition, the new bottle carries a tag indicating it will be part of AleSmith’s Anvil & Stave Barrel Series, which is named after the Anvil & Stave blending bar located inside of the brewery that opened its doors in 2016.

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