Aargh every time! I bought them a heavier, "non-slip" one and after a day they have worked out how to spill that too. In the interim, one of them took to dipping his paw in and sloshing the water out of the bowl. What is the point??????? And how do I stop them? Can cats drink from those little water bottles that rabbits have? They have to have water available, and I need it to be non spill as they are "home alone" some of the time.