Step 1
In a small saucepan over medium-high heat, bring granulated sugar and 1/2 c. water to a boil, whisking until sugar is dissolved. Let cool.
Step 2
Transfer simple syrup to a medium airtight container. Add lemon juice, lime juice, and grapefruit juice and stir to combine.
Step 3
Make Ahead: Sour mix can be made 2 weeks ahead. Cover and refrigerate.
COCKTAILS
Step 1
In a cocktail shaker, combine sour mix, tequila, gin, triple sec, vodka and rum. Fill shaker with ice, cover, and vigorously shake until outside of shaker is very frosty, about 20 seconds.
Step 2
Strain between 2 Collins glasses filled with ice. Top off with Coca-Cola. Garnish with lemon wheels.
1 1/4 oz fresh lemon juice
1 oz simple syrup
1 oz blanco tequila
1 oz gin
1 oz triple sec
1 oz vodka
1 oz white rum
top off coca-cola