I found my drink for the summer...Crystal Light Sunrise Classic Orange. It tastes almost exactly like Tang. I LOVE Tang, but it has so many calories in it. This stuff is sugar-free, has only has 5 calories per serving, and 100% of your Vitamin C requirements for the day. Plus, it does not have that weird Crystal Light aftertaste that other flavors do.
Give it a whirl! You will love it if you are a fan of Tang.