Vodka. Mid-shelf vodka such as Tito’s, Ketel One, or Smirnoff works beautifully — top-shelf isn’t needed.
Cranberry juice. Cranberry juice cocktail (the sweetened red kind) gives the classic flavor balance. For less sweetness, use 100% cranberry juice and add a splash of simple syrup.
Make a pitcher. For 8 cocktails, combine 12 oz vodka, 16 oz cranberry juice, and 16 oz orange juice in a pitcher. Refrigerate, then pour over ice in individual glasses (don’t add ice to the pitcher — it dilutes the batch).
Make-ahead. The juice mixture can be combined up to 2 days ahead and refrigerated. Add vodka and ice just before serving.