I agree, just keep trying and try mixing breast milk with whatever you give her. Also, you might try yogurt if you haven't already. She will eat eventually! (at least, until she is about two, then they stop eating again, but it's okay!! It's normal!) They don't need anything but breast milk for the first year, eating is just for fun and to learn. If you want a good book to help, read Super Baby Food by Ruth Yaron, tons of good suggestions!!
The lactation consultant that I talked was strongly against feeding cereal out of a bottle or feeder because it encourages poor eating habits; but, if it is for a limited time and it is all she will take, go for it!