Leftovers (without ice or seltzer) keep in a covered jar in the fridge for about a day. Shake before pouring.
For 8 drinks, use 32 blackberries, 32 to 48 mint leaves, 2 tablespoons plus 2 teaspoons sugar, the juice of 8 limes, and 2 cups vodka.
All nutritional information provided is an estimate. For specific dietary needs or concerns, we recommend consulting a nutrition calculator or a qualified expert.