I love the convenience of this dog bowl! However we got a medium and we're thinking about exchanging it for a small because of the amount of water we would have to carry around on hiking trips in order to fill up the bowl enough. Even though we just got this bowl, I can see what Michael said about it losing its shape. It is very sturdy now, but I can see it getting kind of worn and warped after several months of wear and tear. But for now, I am very happy with the function of this bowl.