I like tap water with one lemon squeezed, maybe a 1/2 tsp sugar, lots of ice, tall glass. I love, above that, a naturally bubbly mineral water (that has a lot of minerals, not just Perrier) refrigerator cold with a squeeze of lemon or lime and no sugar. Bracing..
All this makes me want to try a real coconut, but no chance to find one in a store here. I use canned coconut milk, sweetened or not, depending on the dish, in some of my cooking..
CJane's chart re nutrition was helpful - now I'm going to check out the Silk coconut milks.