Should my daughter be drinking water or juice in her sippy cup?

My 19 month old doesn't get juice, and never really has. I see absolutely no need for it (unless she's constipated, so maybe once a month & mostly water.) I would be upset as well, but as least it only happened once. It won't have any lasting effects on your daughter. I would put my foot down though, and I'd have to tell my mom (if it were me) that unless she could respect my wishes as a parent, she wouldn't be able to watch my child alone.