I have 7 cats and we have 4 LB's. One is an oversized rubbermaid pan. I tried to downsize that one to a regular pan but it filled too quickly even when I was scooping twice a day. We recently bought a rubbermaid ornament container and converted that to a LB. Benson has a issue when he urinates, he shoots over the pan. This box isn't as wide to keep the heavy cats from using it.