This definitely reinforces the point. You're not allowed to bring your own drinks in, if you want to drink anything you must buy an overpriced drink from one of 3 or 4 sponsors.
Well, that's a different argument from the one that coke is your only option ;)
Can't say that I like these sponsorship deals enforcing things like this though. Going to a festival? Flat Carlsberg it is!
> that coke is your only option
Admittedly the tag line needs some work, but with a good enough Logo it will sell.