"We went blackberry picking and came back home with way too much of those awesome fruit. That is when I thought I could used some to make a nice cocktail. Hope you'll be enjoying as much as I did. Cheers!"
Combine blackberries, raw sugar, mint leaves, lemon juice, and lime juice in a tall glass; muddle until mint leaves and blackberries are slightly crushed. Add lemon-lime beverage and vodka. Fill a cocktail shaker with ice; add blackberry mixture. Cover shaker and shake; pour into a glass.