It was great the first time we used them, but after one washing, the lids would no longer match up with the the soft sippy part.  It also leaks everywhere.  My poor son is drenched in whatever he is drinking after two sips.  It also has spilt all over my diarper bag.  So if you love to clean up messes then go for it lol, but it's too much hassle, and any money down the drain is too much.