Start by making some simple syrup. Simply dissolve ¼ cup of granulated sugar in ¼ cup of water over low heat. Then, set aside to cool.
Place a small mesh strainer over a glass and press 8 fresh raspberries (or a few more if you're using plain vodka) through with the back of a spoon. Discard the seeds.
Once the simple syrup is cool, combine it with the raspberry juice, ½ tablespoon of lime juice and 2 tablespoons of vodka.
Split the raspberry vodka mixture between 2 glasses. Fill the glasses with ice and add soda water.
Garnish with raspberries, lime slices and basil leaves. Then, stir to enjoy!
