I got the inspiration for this Patron cocktail from a restaurant I went to with my husband. I never realized blueberries and basil worked so well together as a cocktail. I immediately went home and go to work replicating this for myself. This drink requires plenty of fresh blueberries and fresh basil. I'll be very honest - you cannot have too much blueberry OR basil in this drink. I don't speify how much Patron you need - because it's really up to you. You can get away with a cup worth or more. Either way - it gets diluted further when you mix the San Pellegrino. Finally if you want to make this really refreshing - freeze this mix.