Worried about hydration

[chevy4by]

My baby is 10.5 mos old. She eats solids really well, and I am trying to get her to use a sippy cup. This morning, I tried putting her morning milk (EBM) in the sippy instead of a bottle and she only took about .5oz. Throughout the day, she was offered 3 more bottles and ended up taking only about 14.5oz for the day, as well as about an ounce of water. I am worried that she will not be getting enough fluids at this rate. I typically give her a sippy with water (occasionally with a tiny bit of apple juice.....Im trying to get her to drink...) when she eats solids, but she never gets even an ounce. How much is enough?