Thankfully, I don't buy kool-aid any more. Now, I'm trying to be disciplined and reserve soda for special occasions only (like Shabbat, Festivals, Date Night, etc.) Again, I emphasize the word "trying" because I admit that I'm not quite ready to go cold turkey off the soda, but I'm sure "trying" to only drink it in moderation.
With that said, I invested in a decorative water jug to fill our purified water, a little lemon, then chill in the fridge to make it even more refreshing on a warm day.
And of course, I thought of how my grandmother would make "sun tea" by setting out a glass gallon jar in her backyard all afternoon with a few tea bags in it....Good Times!