2 cups blackberries, roughly chopped 2/3 cup sugar 2/3 cup white wine vinegar seltzer

Mash blackberries with sugar. Cover and refrigerate overnight. Whisk in white wine vinegar, then press through a fine mesh strainer into a resealable container. Fill glass with ice, pour in 2 oz. shrub and 5 oz. seltzer. Shrub can be stored in fridge for 3 weeks and gets mellower with age.