T.C.
The tilty cup by far! I handed this to my daughter when she was 7 months and there was no training involved. She got it right away. I had previously bought some other cups with hard tips and rubber tips and she just played with it and chewed on the rubber. She'll be two this week and she still uses it! The infant teacher at her school reccomends it to all the parents now b/c of my daughter. You can get them online or at buy buy baby if you have that store. I think The website is www.tiltycup .com. Read up on it. I think they are like $6.95 for 2 cups.