I am not a fan of water nor the super sweet drinks available out there so I take a liter bottle and fill it 1/4 full of purple grape juice and then add water to it. I drink this while playing and while not playing and take a cooler full of these drinks wherever I go.
When I play in the daytime and it's hot outside, I drink lemonade or cool juices, and in the evenings when I'm in the game I drink coffee or tea, very rarely I drink beer and do not drink other drinks!