“I was so tired of scraping and cleaning the plastic boxes - so, I was intrigued when I saw these. I have two big cats and these boxes are purrfect! They easily last three weeks. When you are done you just toss them and start with a nice clean box. I buy two at a time. They are nice and deep so it REALLY helps tremendously with the one cat who "covers" forever and keeps the litter from going everywhere.”