Sorry I didn't reply sooner but I just thought of this today. It was a very hot day here (we are just starting summer) and my son drank about 12 ounces (350 millileters?) of water in 3 hours. At first I was shocked because that is a lot more than he has been drinking. Then I remembered last summer when it was hot he would drink a 6 ounce cup 3 or 4 times a day. Once it was cooler out he started drinking less. Have you had any weather changes lately? Is it getting cooler? If so, maybe that is part of the reason your daughter drinks less. Keep us updated on how she is doing. Good luck.