Step 1.
- In a large punch bowl, combine the vodka, purple grape juice, and lemon-lime soda.
Step 2.
- Add fresh lemon juice and stir gently to mix.
Step 3.
- Fill the punch bowl with ice to chill the mixture.
Step 4.
- To serve, ladle the punch into individual glasses filled with ice.
Step 5.
- Garnish each glass with a few fresh blueberries and a slice of lemon.