Step 1

Stir 3 ounces lime juice, 2 ounces grapefruit juice, 2 ounces orange juice, 2 ounces silver tequila, and 1/4 teaspoon coarse sea salt together in a liquid measuring cup or cocktail shaker until the salt is mostly dissolved.

Step 2

Fill 2 cantaritos or Collins glasses halfway with ice. Divide the cocktail between the glasses. Top each glass with 2 ounces chilled Squirt soda. Garnish with a sprinkle of salt and lime and orange slices if desired.