How much liquid is too much?

I drink alot of liquids in a day. I go threw about the equivalent of 2-5 1 pint water bottles every hour. A sip of water to me is about 1/4 a bottle of water. I re-use water bottles and any kind of plastic bottles (a whole 'nother story) and a co-worker recently commented on how many times I go and refill my water bottle in a day. I do this everywhere - at home, work, and when I go out I have to carry a bottle of water in my purse and refill it whenever I get a chance. I would estimate I drink about 30-40 bottles of liquid (juice, water or ice tea) in a day. Is that bad? My coworker asked me if I have diabetes! I've been like this for several years and had to bring water bottles with me to school....