Of course, she's being all Vivian about it and is flat out refusing to drink milk from a cup. Milk from a bottle is fine. Water in a cup is fine. Milk in a cup is an affront to nature apparently.
I realized later that she might be cutting her molars, and maybe that's why she's in such a terrible mood. So for now we're back to bottles, but I really, really hope it will end soon.
Anyone have any suggestions?