Taking care of your mind, body and soul. Boutique Studio Cori’s Walnut Creek private studio is a relaxing, serene, intimate environment where you will leave feeling refreshed and You will receive 1-1 customized facials with Cori Miller, whose simple and effective techniques have earned her respect in the industry. Facials Cori offers customized 60 and 90 minutes facials for men and women, as well as chemical peels. Cori specializes in treatments that focus on radiance, glow, anti-aging, and overall skin health.