Run a wedge of lime across the top of 2 cocktail glasses. Once damp, coat the rim in salt.
Add all the ingredients except the sparkling water into a cocktail shaker with a few cubes of ice. Shake for 30 seconds until chilled and then strain the margaritas into serving glasses with new ice. Top with a splash of sparkling water in each glass and serve immediately.
Notes
Switch up your flavor of sparkling water for fun new combinations.