How can i use vodka with citric acid added?

I developed a recipe for sour shots, but I had to use sour vodka to get the shots potent, sour and fruity enough, and I’d like some ideas on how to use it for other stuff.

The sour vodka is made about as sour as “super juice” or 60g of citric acid to a liter of vodka, and the shots are equal parts fruit syrup and sour vodka.