Well, I don't think I consume a huge amount of caffiene. I drink usually 1 to 2 cups of coffee in the morning, then I will drink usually 3 20 oz bottles of water and then in the evening I will have a glass of tea.
That is my normal intake, when I go on bike rides you can add a couple of water bottles of iced water with that.
Of course lately with the down pours of rain we have been getting bike riding has been out completely. I'm sick of rain.