The latest small-batch, high-quality liquid gold to emerge from Napa Valley is not a Chardonnay, but a facial serum. Vintner’s Daughter Active Botanical Serum for Face, a multi-correctional oil meant for all skin types, is the brainchild of April Gargiulo, who first learned the lesson that purity of ingredients equals quality on her family’s farm, Gargiulo Vineyards. Growing up prone to acne, she set herself the mission early on to investigate which lotions and creams actually performed as their manufacturers …