My 15 month old will only drink formula and breastmilk...and barely drinks any water except while she's eating. If I give her water any other time, she will refuse or drink very little. IF I offer her formula, she will gulp it all down. I've tried putting in apple juice or pear juice but she refuses it more than water. I've also tried diluting formula in the water but she will also refuse it. So my question is is it ok that she only drinks formula and very little water? She seems pretty hydrated. She can drink approximately 90 ml of water and 300 ml of formula on top of my breastmilk (which I barely have left).