Published September 12, 2018 15:02 How much Sparkling Drink Mix should I use? With SodaStream, you're in control of both flavor and carbonation. In general, use a capful of Sparkling Drink Mix for each liter of sparkling water. If you like it sweeter, add more! If you like it less sweet, use less. You do you. Related articles How do you use sparkling drink mixes? How do I get the right level of carbonation?