I thought that using straws has been proved to be a massive myth? THe arguement is, if theres acid in your mouth, it'll attack the enamel. Unless the straw is actually going into your throat, if you taste anything acidic, it'll get to your enamel.
Also "Red Bull and a sleeping aid"? What's that about? I can't believe I've drank vodka and RB years ago in clubs. I mean, the Red Bull element is bad in itself but mixing a caffeinated drink with a drink like vodka, it's so bad for your health. That's why I'm confused why you would mix a Red Bull with a sleeping aid.