NTRabbit
Brownlow Medallist
At the cricket I bought a bottle, and was surprised when they said I could refill it for free at the bar.
Didn't bother though to test if that was true. I guess it may be part of their responsible serving of alcohol policy that they should provide water. If that is the case you should be able to get water for free?
The new 3rd floor bars in the cricket members stand had free to use filtered-style taps with a stack of free cups next to them, very useful