To be honest I have seen these but have never used one so I don't know the first thing about this kind of fogger. But ya your idea seems to be on the right track. What if you put it in a container like u said but put a lid on it with some holes. That way when the fog comes out it can escape through the holes still but the water will just stay the in the container instead of splashing all over the place. But then will that thing be safe sitting in water, again I have seen them but don't know exactly how it works. If you cant figure it out I would post a new thread in the enclosure part of the forum and if a guy name Bill or Paul see it I bet they will be able help you out.