What is this day may be buying water powder? How then prepare?!
Answers: Writes details, not understanding your question
Are you talking about flavour mix or mineral? You cannot rehydrate water without water.
I think you mix water powder with water.
Be careful not to use too much water or it may turn out watery.
Please re-phrase this question. No one can understand it.
Tuesday. Mix briskly. Serve.
Please please let this be a joke question. Usually if it's something instant you add, water. This would not make sense. You cannot powder water, you can seperate the hydrogen from the oxygen.