Upslope Brewing Co. is releasing a brand new addition to its Tap Room Series this month that was originally developed by the brewery’s taproom employees.

Blackberry Lemon Kettle Sour is a 4.5 percent ABV sour ale brewed with blackberry and lemon. The ale is the newest and fourth addition to the Denver-based brewery’s Tap Room Series which includes releases of beers that are “carefully selected by our brewers and vetted in our tap rooms.” This year there will be eight beers in the Tap Room Series.

According to an email sent to Tenemu, Blackberry Lemon Kettle Sour will be packaged in 19.2-ounce cans that are scheduled to be released at the brewery on June 19.