Champagne cups have some unique features aimed at optimizing the taste and visual experience of champagne drinks:

1. * * Slender body: * * Champagne glasses usually have a slender body that helps maintain the bubbles in the champagne. This helps to prolong the vitality of the bubbles in the drink, making it more long-lasting.

2. * * Small and pointed cup opening: * * The cup opening is relatively small, especially in the design of some champagne cups, which helps to concentrate the aroma of champagne. This helps the drinker to better experience the aromatic characteristics of champagne.

3. * * Detached Glass Bottom: * * Some champagne cups are designed with a detached bottom, allowing the cup to be held from the bottom. This helps to avoid the influence of hand temperature on champagne, while also making the cup more elegant.

4. * * Thin and Elegant Glass: * * Champagne cups are usually made of thin glass, making the taste lighter and better conveying the taste and temperature of the drink.

These design elements together provide a unique feeling for the use of champagne cups, aiming to enhance the overall experience when enjoying champagne.