Thanks playfelt! I don't think it is her teeth though. She doesn't quite get the concept of holding the cup herself yet. I've been trying to teach her and have the cup on her high chair while eating so she can watch my daughter and the other little one I have do it, in hopes she catches on. I asked her mother how much milk she takes from her with the sippy and she told me 2-3 oz but she has to hold the cup for her. If she continues to not take anything from me, I will try the medicine syringe. I never thought of that. Thanks!