i'd be interested in learning how other moms have introduced the sippy cup. my dd is 8 months and only seems interested in playing with the cup. she doesn't have a clue as to how to drink from it. i use a cup with a valve which makes it difficult for the drink to come out. i've tried demonstrating how to drink from it--but this doesn't help things. I'd also be interested in recommendations for the best starter sippy cups.