Kir is a classic French cocktail made by mixing dry white wine with crème de cassis, a sweet blackcurrant liqueur. Traditionally, it is served in a wine glass and is known for its refreshing taste and vibrant color. The drink is often enjoyed as an aperitif, stimulating the appetite before a meal. The drink has variations, including Kir Royale, which substitutes Champagne for white wine, adding a touch of elegance. Kir is popular in France and can be found in many bars and restaurants, showcasing the country's rich tradition of wine and cocktail culture.