Coconut water is the clear liquid inside young green coconuts (fruits of the coconut palm). Coconut water has long been a popular drink in the tropical countries where it is available fresh, canned, or bottled.

Coconuts for drinking are served fresh, chilled or packaged in many places. They are often sold by street vendors.

Processed coconut water for retail can be found in ordinary cans, Tetra Paks, or plastic bottles, sometimes with coconut pulp or coconut jelly included.

In recent years, coconut water has been marketed as a natural energy or sports drink having low levels of fat, carbohydrates, and calories, and significant electrolyte content.

Medical use

Coconut water has been used rarely as an intravenous rehydration fluid when medical saline was unavailable. This rehydration technique has been used only for short-term emergency situations in remote locations where plasma is not available.

Folk medicine

Coconut water may be used in folk medicine practices such as the treatment of diarrhea.