sips out of a cup

I've been itching to give her food but trying desperately to wait until she gets closer to her 6 month birthday. But today with her persistent interest in our food we gave her water out of a cup. It has to be luke-warm but she loves it! And even fusses a little if we take it away before she is done with it. She does so well. At first she had a lot of tongue action, but I think tonight she got the hang of it. What to expect the first year and the Rie method both recommend that you should introduce the cup first. (The Rie method says not to introduce the sippy cup at all.) But my plan is to introduce the cup and then use the sippy cup later for car rides and stuff.