Coconuts are part of the daily diet of many people. Coconuts differ from other fruits as they contain a large quantity of "water" and when immature they are known as tender-nuts or jelly-nuts and may be harvested for drinking. Coconut water has long been a popular beverage in the tropics, especially in
Southeast Asia, Pacific Islands, Africa, and the Caribbean, where it is available fresh, canned or bottled. Throughout the tropics coconut water is sold by street vendors, often cut in front of customers to ensure freshness of its water .Coconut water can also be found in ordinary cans, tetra packs, or plastic bottles (sometimes with coconut pulp or coconut jelly included). According to scientific research bottled coconut water has a shelf life of 24 months.
Coconut water has been marketed as a natural energy or sports drink due to its high potassium and mineral content. Marketers have also promoted coconut water for having no fat and very low amounts of carbohydrates, calories, and sodium. Unless the coconut has been damaged, it is likely sterile. There have been cases where coconut water has been used as an intravenous hydration fluid in some developing countries where medical saline was unavailable.