Belle already had one very basic potty when we acquired two more elaborate potty trainers. These are "three in one," ie, potty breaks down to a training seat and a step stool. Now I keep one downstairs and two upstairs. Belle hasn't grasped the concept yet. She instinctively sits on a potty, applauds herself and gets up again without doing anything. Her instincts urge her to use the cup for other purposes.