My 2 year old demands more water in her straw cup often, especially to stall at nap and bedtime, but lately when I fill her cup and give it back, she demands that she needs "MORE! MORE! MOREEEEE WAAAATEERRRR!" It makes me ragey. I try to show her that her cup is full but she still loses her freaking mind. Even if I go back and get her "more" again, she will often start the crying all over again. I don't know how to diffuse the situation. Anyone else's toddler act this way?