Red Bull Beverage is a functional beverage, which has the function of refreshing the brain, supplementing physical strength and resisting fatigue. It is mainly for healthy adults and men. The can is marked unsuitable for children, but personally, people in special physical conditions, such as pregnant women, cardiovascular and cerebrovascular patients and diabetic patients, are advised not to drink it. Red Bull formula is mainly composed of amino acids and vitamins, containing a certain amount of sugar and a small amount of caffeine. If someone is sensitive to caffeine, it is recommended to drink it at discretion, which is equivalent to the caffeine content of a bag of tea.

Iced black tea drinks are ordinary tea drinks, which are made of purified water, white sugar, citric acid, black tea powder, sodium citrate, refined salt, vitamin C, caramel-colored food flavors, etc. These tea drinks contain a poor amount of tea, and also contain many flavors, sugar and so on, which are harmful to health.