Coconut water, less commonly coconut juice, is the clear liquid inside coconuts (fruits of the coconut palm). In early development, it serves as a suspension for the endosperm of the coconut during the nuclear phase of development. As growth continues, the endosperm matures into its cellular phase and deposits into the rind of the coconut pulp. The liquid inside young coconuts is often preferred to the liquid of a ripened coconut.
Plain coconut water has long been a popular drink in tropical countries, where it is available fresh, canned, or bottled.
Providing 19 calories in a 100 millilitres (3.5 imp fl oz; 3.4 US fl oz) amount, coconut water is 95% water and 4% carbohydrates, with protein and total fat content under 1% each (table). Coconut water contains small amounts of vitamins and dietary minerals, all under 10% of the Daily Value (DV)(table).
Coconuts for drinking are served chilled, fresh, or packaged. They are often sold by street vendors who cut them open with machetes or similar implements in front of customers. Coconut water for retail can be found in ordinary aluminum cans, Tetra Paks, or plastic bottles, sometimes with coconut pulp or coconut jelly included.