1, Red Bull: Red Bull energy drink, also known as red bull vitamin functional drink, contains a variety of nutrients and caffeine.

2. Coke: refers to a sweet, caffeinated carbonated drink, which contains caffeine but no alcohol.

3. Coffee: Coffee beans contain 100g of caffeine.

4. Tea: New tea contains more caffeine, active alkaloids and various aromatic substances.

5. Milk tea: The average content of caffeine in a cup of milk tea is 270 mg, and the highest content is 428 mg, which is about 4 cups of coffee.