J.B.
You may not have found the right sippy cup for her yet. At walmart they have one that have a very soft (nipple like) top that helps them transition to the cup. Then just start trying with a harder cup and a little harder and so on. Dr's say that you should have them off the bottle and formula by 12 months. That may be why the daycare is pushing it. It is a common thing for Daycares to require sippy cups instead of bottle by a certain age.