Used it for the first time yesterday, and the water stayed perfectly in the bowl. It is similar to those blue, above-ground pools that are circular in shape. Keeps the water in without any foundation or side structure.

We purchased these and find that they are just as cute as the picture shows. They hold water well and the pugs drink out of them fine.

We find that, when on the road, we are more inclined to use a regular bowl instead of these--it's easier and we don't need to leave it out to dry out. However, if we are carrying a backpack and need to tote along a little bowl, this is ideal.

Use it? Not much. But when we do use it, we love it!