Just go for a frozen wash cloth - cheaper and more effective
I find the design to be flawed.  They have the protective ring around one side so the kid can't stick it too far down his throat, but not on the other side! So if you're not watching, baby sticks the whole thing down and gags.  So I have to supervise when in use and that's kind of a deal breaker for me.  Plus, $10?!  Seems a little high to me.  The babies don't really go for these when teething anyway.  They get a few minutes of use and then they're discarded.  The real winner around here seems to be the frozen washcloth.  A lot cheaper too.
Rating: 3 stars