I have tried to use alternate liners because they are so expensive, but those can get bulky and take a few minutes of manipulation to work properly with the box (and sometimes post-cleaning). These can slide on/off in minutes since they were made to fit the box. They're also durable and easy to tie up when full. The only reason I'm giving it 4 stars is because they are considerably more expensive than a large litter box liner, which is the other thing I've used.

They are great but wish they came waterproof !!

Liner

The liner works well once it's waterproofed thoroughly with gorilla waterproofing spray. The seams aren't sealed enough if you don't, especially if you have a cat who aims for them. I bought it to make it easier to clean the box and have no downtime. It fits perfectly, which you would expect since it's from the original manufacturer.

I bought another liner because it takes a while for the liner to dry when cleaning. With two, I can switch them out and not have to worry about dry time. I have had no issued with purchasing accessory items or extra parts from Popur. I always get my purchases quickly, and I appreciate that.