Step 1

Salt rim: Spread a thin layer of honey onto a plate. Place a thin layer of sea salt onto another plate (mix with grapefruit zest, if desired). Turn each glass upside down and place into the honey followed by the salt until all the rims have been salted. Fill each glass with ice and set aside.

Step 2

Pour half the grapefruit juice, lime juice and tequila into a cocktail shaker and fill with ice. Shake for one minute.

Step 3

Pour the mixture into two of the glasses and repeat with the remaining liquid and glasses.

Step 4

Top each cocktail off with about 3 ounces of seltzer water. Garnish the cocktail with mint leaves and a lime wedge. Serve.