''Otai' is a fruit drink which originated in Tonga and is usually made as a summertime refreshment. It is a blend of water, coconut milk, and any variety of pulped tropical fruit such as coconut, watermelon, mango, and pineapple but is almost always watermelon as it is plentiful in Tonga. A small amount of sugar may be added, although the recipe is considerably sweet on its own. I lived in Sydney many moons ago and the Polynesian families drank this by the gallons in the summer. Soooo refreshing and yummy! Serve over ice cubes.