I pour the rest of the Kool-Aid into the ice cube tray. What doesn't fit goes into a glass. Waste not want not:)
Now, I make a new pitcher of Kool-Aid, lemonade this time. I guard the fridge with my life & a spatula making sure no one drinks it. Then in a few hours I have ice for my fruit flavored beverage that won't water it down. So simple, so genius.