Playtex Baby Training Spout Cup - great for your growing child.
The primary thing to like about this cup is that it doesn't leak. Obviously, whether or not a cup leaks is always a concern when looking for a sippy cup, and transition sippy's are no exception. So for this metric, this cup more than fits the bill by refusing to give up any liquid, no matter how hard we tried (and laughed) trying to get it to do so.
This is the best sippy cup trainer that I have ever used for my child. The squeeze option on the cup makes it easier for him to remember to suck on the straw to get the drink.

This cup only has a few parts to clean

Leak-proof seal
Twist 'n click
Removable handles for development
Easy to clean--all parts are top-rack dishwasher safe
BPA free
For ages 4 months and up
Colors may vary

I was really excited when I purchased these because my son really loved this cup but after a few weeks the cup is leaking ALL the time , there's water all over my son. The cup is suppose to be leak proof. It was not worth the money at all