There's no rules, just make it the way YOU like it. I drank it once 1/2 vodka 1/2 redbull, when I say once I mean once, I only had one of them! I can't drink a lot of that redbull shit, it's far too sweet. I rarely drink vodka but when I do I mix it with either coke, diet coke or pure orange. I know these are all sweet drinks but they're not as sweet as redbull.