As far as I know, nothing prevents kidney stones except maybe drinking more fluids (water is always the best bet). It's possible that he's just recommending liquids that he thought you would like so you would drink more.
There are lots of folk remedies for kidney stones, but there is no clinical evidence which differentiates drinking liquids from the type of liquid being drunk. So I would say drink what you like but try to increase fluid intake. And in general, I think water is the best liquid you can possibly put into your body.