As I became familiar with my former husband's family-before he was "former", I got to drink "Au Tai" pronounce "Ow tie". It is common in Tongan households to have a pitcher of this drink in the refrigerator, all times of the year, but especially in the summer. It is absolutely delicious. It is a little bit of a chunky beverage, but the chunks are small and are a refreshing treat. This is a somewhat labor intensive drink, but you'll find it is incredibly refreshing; and well worth the effort. My family and friends love it.
Cut watermelon in half. Scoop out the melon from the shell, using a regular or soup spoon (pieces need to be bite sized or smaller.) Do not include seeds. Put melon meat and juice into a gallon pitcher.
Cut open the coconut shell, remove meat and grate. Put coconut meat into the gallon pitcher.
Core and remove outside of pineapple, and grate the pineapple meat; or add can of pineapple (crushed and juice). Pour into the pitcher.
Add half and half and sugar. Stir well. Fill pitcher to the top with cold water. Stir well. Store in the refrigerator until ready to serve.
During the off season, you can use 6-8 mangos and 6-8 apples in lieu of the watermelon. You still need the pineapple,coconut, etc.though.