S.J.
Water down every other drink item you give her - juice, etc. And no carbonated or caffeinated drinks. She should stay pretty hydrated that way.
My kids love when I make "fruit water" - all I do is get a big pitcher (a clear glass one), fill it with water, and then slice up all kinds of citrus fruits (ie, lemons, limes, oranges). Drop the slices in the water and you have flavored water that looks pretty cool! My kids think it is neat and drink it up.