Hello BB ladies! Help please!

Miss Z turned 1 on Halloween. So, just like I did with her older sister, I threw the bottles and formula out (she was fully formula fed from 3 months) and started with that A2 milk.

She woke up on the Thursday with a severe ear infection, which required strong antibiotics poor lil muffin.

She is drinking LOADS of water, from her cup with a straw, which she has been doing since 6 months old. But, she just won't drink any milk. I have bought a couple different types of sippy cups, straw cups etc to try and entice her. But, she just won't drink it.

What can I do???

Help please!!