I know food is expensive at any arena but a co-worker just went to a concert last weekend in St.Louis and a bottle of water was $4.75 bottle size don't know, she didn't know about any thing else just water because that's what she was wanting. she didn't buy it but said they did have water fountains. So guess if you can sneek in a bottle of ice from the hotel. 

) ??? Water is nasty heh heh heh