Build in rocks glass over ice, add garnish - do not strain cranberry infused vodka.
Cranberry infused vodka: Muddle 1 cup fresh cranberries in 1 qt. jar to pop most berries. Fill with 1 qt. potato vodka (I use Luksuskowa) or other neutral grain vodka. Seal tightly and refrigerate for at least 24 hours. Should keep for several weeks in fridge.