Fruit flavored waters

I recently went to a friend's house for lunch, and she served a pitcher of water with watermelon slices. Refreshing with a touch of sweetness. This summer, wouldn't it be nice to have flavored waters in the fridge to make drinking water more delicious? You could use slices of lemon, lime, orange, grapefruit, strawberries, raspberries, mint, cucumber, whatever! What are your favorites? xo Update: Thanks to the readers who suggested pineapple and clementine--yum.