I was fooling around with citrus ice cubes made from lemonade and chopped up lemons, oranges and green lemons the other day. After spending the night in the freezer, I put several ice cube in my insulated tea glass and doused them all with some sparkling water. It certainly looked attractive.
But the curious thing was that the ice cubes seemed to take much longer to dissolve and melt, so while the drink was really cold, the ice cubes kept their shape, the chopped citrus was suspended throughout the drink, and the water was slowly flavored with the cold lemonade and citrus pieces. Nice.
Definitely something I would do for a summer party or even just to jazz up a glass of iced tea or lemonade. You could go further and freeze other things into your ice cubes like herbs, fruit, etc.