B.B.
Funny you should say this.. I was about to write about my 2.5 year old boy who does the same thing. When he wakes up in the morning he will chug a 9oz cup of milk and then still want more!! It lasts all day long, and like you it doesn't matter what's in the cup as long as it's liquid. I have also looked up diabetes because of the excessive thirst, but I'm not sold on the idea that's the problem. I'm still looking for a reason, no advise here, I just wanted to let you know you're not alone. Good luck, and if you find some reason behind it, let me know!! Good luck.