You could make yourself a glass of Miss Collins, but why stop there? For a pitcher, multiply ingredients by five, top with soda, and garnish with lemon and grapefruit wheels.
1.5 oz. Belvedere vodka
3⁄4 oz. Grapefruit juice
1⁄2 oz. Simple syrup
Soda water to top
Shake with cubed ice and strain over fresh ice into a highball. Top with soda water and garnish with a lemon wedge.