I've done something similar, although probably not as healthy. I take the 24-ounce water bottle from my bike, dump a tray of ice cubes into it, add two healthy "squeezes" from a squeeze bottle of pure lemon juice and two scoops of sugar. The first few swallows are pretty intense, but as the ice melts and dilutes the mixture it becomes mellower. Cheap and thirst quenching.

tanstaafl.