5 oz of san pellegrino (or sparkling water)
2 1/2 oz of Stolichnaya vodka (or Vodka)
1 slice of lime
In a cocktail mixer, place Stolichnaya and Pellegrino. Both should have been nicely chilled before hand, so ice in mixer is not necessary. Shake together and then empty onto rocks in Old-Fashioned Glass. Serve with lime slice allowing Drinker to optionally squeeze into drink!