For the lemonade, stir lemon juice and sugar together until dissolved. Add the water. Store in a pitcher in the fridge until ready to use.
When ready to make a mocktail or cocktail, take the basil and blueberries and place in a tall glass. With a long spoon muddle the ingredients together. Top with ice, vodka if using and lemonade, fill to about 7/8 and then top with a little lemon sparklling water.
Nutrition calculation is an estimation only. If you need nutritional calculations for medical reasons, please use a source that you trust.