"Think Baby".. They are at HEB and kind of $$$... We had a few different kinds, but liked those the best... While we were on vacation, my mom packed the others up and went out and bought more.. She likes them best too...
Jackson really likes the playtex insulated ones. I guess I should say that I really like them since they don't leak and they keep the milk cold for quite a while. J will use any type of cup - he could care less which one I give him.
We use the Playtex as well. They never leak and the kids can chunk them across the room and there will be zero splatter. Both kids learned with those the best for some reason. They never figured it out with any other brand.
Re: Sippy Cup Recs
Here are the ones we use. They are hideous, but they don't leak at all and Joe can carry it and sip out of it easily:
https://www.toysrus.com/product/index.jsp?productId=2969607