0 Prepare your mocktail glasses by rubbing a lime wedge around the rim of each glass and dipping the rim into granulated sugar.
1 Add 1/4 cup of fresh grapefruit juice and 1 tablespoon of fresh lime juice into each glass.
2 Add 1-3 teaspoons of agave (depending on how sweet you prefer your mocktail) and mix to combine.
3 Add about 1/2 cup of seltzer water or more, if desired.
4 Garnish with sliced limes and add crushed ice. if desired.
