I have a new puppy and bought a folding cage for the puppy's safety. In order that such a small creature did not dehydrate during the three hours maximum he is in there, I bought this clip-on-dog-bowl. Bowls placed on the floor of the cage can easily be knocked over, trodden in and spilled, meaning you have to clean out the cage every hour or so else puppy gets soaked. Not nice for puppy, not nice for me.
Therefore the clip on version solved that problem in a heartbeat. It's small enough to be manipulared round any leaping puppy, clips on the standard cages with ease and holds just enough water for a small drink without it being a fluid hazard.
It comes as one moulded unit, so nothing to fall aprt, and cleans easily and swiftly. I have absoluteley no issues with this and would highly reccomend it for anyone using a static cage or crate for their animal. It could also be used as a water holder for when you take a small dog out, I just personaly would not be happy driving with loose water in a cage.... just in case!
For more info on the cages I chose, please see my other reviews.