Coconut water is the clear liquid inside young green coconuts (fruits of the coconut palm). In early development, it serves as a suspension for the endosperm of the coconut during their nuclear phase of development. As growth continues, the endosperm mature into their cellular phase and deposit into the rind of the coconut meat. Coconuts for drinking are served fresh, chilled or packaged in many places. They are often sold by street vendors who cut them open with machetes or similar implements in front of customers. Coconut water can also 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 due to its high potassium and mineral content. Marketers have also promoted coconut water for having low levels of fat, carbohydrates, and calories. However, marketing claims attributing tremendous health benefits to coconut water are largely unfounded. Unless the coconut has been damaged, it is likely sterile. There is a single documented case where coconut water has been used as an intravenous hydration fluid when medical saline was unavailable. Although this is not generally recommended by most physicians today, it was a common practice during the Khmer Rouge regime in Cambodia from 1975 to 1979. Coconut water has long been a popular drink in the tropics, especially in India, Brazilian Coast, Southeast Asia, Pacific Islands, Africa, and the Caribbean, where it is available fresh, canned, or bottled. In the Philippines, it is known as ‘buko’.