What is the main ingredient used to rim the glass for the Mango Berry Bull?

The main ingredient used to rim the glass for the Mango Berry Bull is red sugar. Rimming a glass adds flavor and visual appeal to a cocktail, and in this particular case, the red sugar aligns with the vibrant colors typically associated with mango and berry flavors. The use of red sugar enhances the drink's presentation and taste, creating a sweet contrast that complements the fruity ingredients. This choice reflects a popular practice in mixology where colored sugars are used to elevate the overall experience of a beverage, making it stand out to customers.