A<unk>  or<unk>  beverage is a<unk>  which contains caffeine, a stimulant, which is legal and popular in most developed countries.
The most common naturally<unk>  beverages are coffee and tea, which in one form or another (usually served hot, but sometimes iced) feature in most world cultures. Other<unk> s are artificially<unk>  as part of their production process. These include certain soft<unk> s (primarily cola<unk> s), and also energy<unk> s designed as a stimulant, and to perpetuate activity at times when the user might ordinarily be asleep.
The consumption of<unk> s is often intended entirely or partly for the physical and mental effects of caffeine. Examples include the consumption of tea or coffee with breakfast in many westernized societies, in order to 'wake oneself up', or the deliberate consumption of energy<unk> s by students wishing to study through the night, or revellers seeking to maintain an alert attitude during social recreation. Caffeine can cause a physical dependence, if consumed in excessive amounts. The need for caffeine can be identified when individuals feel headaches, fatigue and muscle pain 24 hours after their last energy<unk> .
Some commercially distributed<unk> s contain guarana, a South American berry with a caffeine content about twice that of coffee beans.
Many<unk> s also have decaffeinated counterparts, for those who enjoy the taste, but wish to limit their caffeine intake because of its physical effects, or due to religious or medical perceptions of the drug and its effects.
In recent years, some alcoholic beverage companies have begun to manufacture<unk>  alcoholic beverages. The manufacturing of such beverages has been met with much controversy.
Caffeinated drink
Dipping tobacco
Mushroom poisoning
Betel nut
Scombroid food poisoning
Tablet
Alcohol rub
Poppy tea