Prepare two glasses of choice. Add 3 blackberries and the juice of half of lemon to each glass. Muddle until the blackberries and lemon are well combined.
Fill the glasses with ice and pour 1-3 ounces of vodka over the ice. Fill the rest of the glass with sparkling water, seltzer or club soda water.
Recipe by Fig & Thyme at https://www.figandthyme.com/blackberry-meyer-lemon-vodka-fizz/