Zen Tattoo | This 30-minute service, known as cupping, is an ancient therapy purposed to relieve local stagnation in the muscle tissue. It is also commonly used at the onset of a cold to prevent full-blown illness. BPA-free plastic cups are applied to skin with a suction technique that feels like a “reverse massage.” Cups may leave round marks that appear like bruises but are not painful. Available only as an add-on to a Zen Express or Zen Classic acupuncture session.