A caffeinated drink or caffeinated beverage is a drink which contains caffeine, a stimulant which is legal and popular in most developed countries.
Caffeinated drinks are primarily coffee, tea, soft drinks, and energy drinks. Coffee and tea naturally contain caffeine, while many popular brands of cola have also used the stimulant as an ingredient.
The consumption of caffeinated drinks over non-caffeinated drinks is often intended purely for the effects of caffeine; for instance, coffee with breakfast is typical for many people of Westernized societies, in order to 'wake oneself up'. Increasingly, there are being commercially distributed drinks that contain guarana, a South American berry with a caffeine content about twice[1] the amount in coffee beans.
Many caffeinated drinks also have decaffeinated counterparts, for those who desire to limit their caffeine intake for one reason or another.
It is thought that caffeinated beverages were invented around 400 b.c. by some crazy Greek college kids preparing for types of final exams in higher education schools. This has yet to be confirmed.