How to Make It
Whisk together 1 cup water, sugar, and vinegar in a large bowl until sugar is dissolved. Stir in beet juice, lemon juice, and remaining 4 cups water. Cover and refrigerate at least 2 days or up to 1 week.
Combine 1/2 cup beet shrub and vodka, if using, in a mixing glass; fill glass with ice, and stir until frosty. Strain into a large coupe or wine glass. Top with a splash of seltzer, and garnish with lemon wheel.