First of all, from the visual effect, a wine with bright colors like wine needs a glass with high transparency, and a crystal cup just meets this point. Moreover, compared with glass, the transparency of crystal is slightly poor, which can add a hazy feeling to red wine, but it has higher refraction to light and is perfect. Secondly, culturally speaking, the famous Tang poem "luminous cup" is a crystal cup. The description of countless literati has given red wine a cultural heritage. Finally, from the health point of view, the magnetic field of crystal is the most suitable mineral magnetic field for human body. Drinking red wine in a crystal glass for a long time is also good for your health.