Personally, I've never tried it. I think you should use a premium vodka like Grey Goose, Vox, Ciroc or Ketel one if you are going to be pouring Red Bull into the glass along with it. There's also been a study done that shows that mixing energy drinks (like Red Bull) with alcohol makes the drinker think they are more sober than they truly are. You can read an article about that here. Interesting....If I'm crocked, I want to know it.