Wine decanter is usually in the shape of “narrow mouth and wide bowl”, for wide bowl enables the red wine to fully contact with air and generate fragrance after oxidation, while narrow mouth is convenient for concentrating fragrance inside the glass. Wine decanter is essentially used for maximizing the contact area of red wine with air and at the same time not taking away the aroma of wine, retaining the original taste of red wine and achieving the highest wine-appreciating realm.