Prep the ingredients: juice the grapefruit and limes.
2 cups grapefruit juice, strained (fresh) about 4-5 large, 5 oz. fresh lime juice, ~ 8 limes
Mix in pitcher: grab a 50 oz. pitcher. Mix the grapefruit juice, tequila, lime juice, simple syrup, and salt. Mix with a bar spoon. (ice and soda added later on, you can add a small handful of ice, just not too much to water it down). 2 cups tequila (blanco tequila), 3 oz. simple syrup, 1/2 tsp. salt
Refrigerate: chill for at least 1 hour or until ready to serve.
Prep the cocktail glasses: place the salt (or whatever you chose for the rim) on a small plate. Rub a grapefruit wedge around the rim of a highball or rocks glass. Dip the rim into the salt & fill the glass with ice.
for rimming: For the rim of the glass you have options: kosher salt, sugar, Tajin, or mix chili powder & kosher salt. , Ice
Pour: remove the pitcher from the fridge and give it another stir. Pour about ⅔ way into prepared glass, and top with some grapefruit soda until it reaches the top of your glass.
2 cups grapefruit soda (dont add until serving or else it will go flat!)
Garnish: garnish with mint and grapefruit wedge and enjoy!
garnish: grapefruit wedge, fresh mint