I got this to keep my puppy from "bucket diving" and paddling all the water out onto the floor. The instructions for installation are not very clear - the photos or drawings could be more detailed. I did figure out how to mount the bottle and then the puppy figured out how to use it. A little patience is required when you first fill it - it drips until a vacuum is formed - but overall, it's a helpful item. I do have to find a brush that will clean it inside since the mouth is small and the inside is shaped irregularly.
My dog wouldn't come near it, even tried to put peanut butter on the edge so she would understand. She would rather dehydrate herself. It may just be the dog, not the product.