Due to a medical condition I cannot drink caffeinated beverages at all and am trying to decide if buying a resort mug is worth it. It seems from looking at the info. here that most beverages offered at the refill stations are caffeinated - coffee, tea, coke, diet coke, Barq's rootbeer, etc... I did see Sprite. Are there any other non-caffeinated beverage offerings? Is water available as well? (I wish they'd offer caffeine-free coke!) Thanks!