Fill a glass with ice and pour the vodka over the ice.
Add the club soda and lime juice and serve.
Notes
Play around with the ratio if you like a stronger drink try 2 ounces vodka and 4 ounces club soda. You can also do a 1 and 3 ratio too. The calories and carbs in a vodka soda will vary from 100 to 130 calories. If you skip the lime juice there will be zero carbs in this cocktail. The lime juice adds 1 carb to this drink.