I know this is a daily topic and now that we've converted to sippys I can officially say i love the MAM learn to drink cup. We won it from fan friday on facebook and I think I will be purchasing a few more. They don't leak, come apart for easy cleaning, good flow, and easy to hold. (We've tried avent and nuby as well, both leak)
It's not the most stylish, just clear with some blue circles on mine, but it works!

Re: My Sippy Recommendation