Cocktail is a mixed drink. It is a mixture of two or more kinds of wine or beverage, juice, and soda. It has certain nutritional value and appreciation value. Cocktails are usually based on rum, gin, agave, vodka, whiskey, brandy and other spirits or wines, followed by juice, egg white, bitter, milk, coffee, sugar and other auxiliary materials. Or a blend of shakes, and finally use lemon slices, fruit or mint leaves as a decoration. Cocktails are popular among wine lovers because of their colourful and unique taste, making them one of the best choices for summer drinks. Cocktails are poured into the cups in order of density so that they do not mix together, forming a layer. For each color of wine with little difference in density, increase or decrease the density by adding ice or swaying.