Tang cant be all that bad. It has been around for years and is a very easy to make source of vitamin c.
This is what the first astronauts took up with them on the first flights into outer space. I do not think that NASA would have sent anything that was not good up there.
You can take this powder with you anywhere and mix it with water. So really all you need is a water supply and a glass and spoon.
You can use TANG in any drink where orange juice is called for. It also is good mixed to a froth in a blender.
You can make good ice cream sherberts with Tang. You simply mix it in the blender and pour some cream in with it. Freeze it in the freezer and there you go.
You are limited only by your imagination with things that you can make with TANG.