One soda syphon is enough for about 5 rocks glasses
Fill a rocks glass to the top with ice cubes
Pour 1.5 oz of lemon juice, 25 oz of sprite, 3.5 oz of triple sec liqueur and 3.5 oz of vodka into a soda syphon
Close the soda syphon and shake it 3-4 times
Pour the cocktail from the soda syphon into the rocks glass and garnish it with lemon zest