My kids are not on the Feingold, but we only eat all natural foods. their website has lists of brands that are all natural (no artificial colors, sugars, preservatives, or flavors as well as other things -nitrates etc) we also love trader joes and whole foods. everything at whole foods is all natural. also there are websites that sell everything you can think of as all natural (we have found cotton candy, lollipops, gum, you name it) I cannot link the sites i know of, but PM me if you are interested.
Parties are the worst! All the moms bring in Hawaiian Punch. So I send him with Stop and Shop flavored water. He loves it! And there are no calories, sugar, or sodium! And I buy milk from a local dairy farm and they do not use growth hormones. And to boot it's delivered, yep I have a milk man! LOL
I liked that one a lot too until we discovered roasted red pepper. Now that's one DD doesn't like (she doesn't like bell peppers) but it's on the sweet side. There was another that we all really liked that had "lemon" in the name of the flavor.
Anyway, they couldn't give it to me because they were buying it!
What's weird is we can't get that flavor around here.