A caffeinated beverage is a drink containing caffeine, a stimulant that is legal and common in most developed countries. Coffee and tea, that in one form or another (usually served hot but sometimes iced) appear in most world cultures, are the most popular naturally caffeinated beverages. As a part of their production process, many beverages are heavily caffeinated. These include some soft drinks (mainly cola drinks), as well as energy drinks intended as a stimulant, and perpetuating activity at