Don't know if this is what she was drinking or not but if you want to try a green drink that taste suprisingly good try Bolthouse Farm's Green Goodness. Concidering it has broccoli, spinich, alge and all sort of other unusual stuff. I think the main reason it tastes good it all the apple juice in it. It has a smoothe consistancy. Go ahead give it a try

Bolthouse Farm's makes lots of other good drinks too.