I like the fisher price 4+ month ones. I use them with my 5 month old and have for a few weeks. They have a spout similiar to a bottle and there is a side ways straw that helps the liquid come into the spout. They still have to suck and bite down on it for the liquid to come out. They don't leak!
Re: Recommend your Sippy Cup
TTC since May 2006. After 3 failed Clomid cycles, 2 failed Injectibles/IUIs, 2 failed IVFs and 1 failed FET, we moved on to adoption!
Last ditch FET resulted in BFP, and identical twin girls!