Christina Turley, twenty-eight, has the urban savvy of a Trump and the self-possession of a Kennedy. She stores wine bottles in her oven and ages her own Negroni cocktails in a two-gallon barrel on her kitchen counter. And as the face of Turley Wine Cellars, she aims to create an “American” wine culture through Zinfandel, thereby sweeping away the stereotypes that have gathered around the varietal like dust bunnies.