Last month, Stone Brewing Co.and The Lost Abbey brewed a beer together that is being aged in very different types of barrels.

The collaboration is Sticks n’ Stones, an 8.3 percent ABV “dark imperial lager” brewed with German yeast before being partially aged with wood chips “sticks” in stone granite barrels. According to a post on Stone Berlin’s Indigo website, the new lager was brewed on Nov. 14.

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Sticks n’ Stones is one of the brewery’s Groundbreaking Collaborations that is being brewed at Stone’s new Berlin facility, which opened in Sept. 2015 after more than a year of construction. In 2014, StoneBerlin launched an Indigo campaign online that eventually raised more than $2.5 million to build the new brewery, with contributors having the option of being awarded large-format bottles of 14 different collaboration beers that will be produced in the next year. However, smaller format bottles will be sold of some of the resulting collaborations.

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According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Sticks n’ Stones will be packaged in 750ml bottles, although larger format bottles will also be available for some beers to the Indigo contributors. An email sent to the brewery for additional information was not immediately returned.