We love our flip litter box and these liners are perfect for them.
Flip Paperboard Liners (6-Pack)
Good alternative to plastic!
I was skeptical to try the new paper liners but they are good. One tip is to pay attention as to how saturated they become and not go as long as you would with the plastic liners otherwise it's a messier clean up. I was concerned the paper backing isn't as high as the litter box (my cat is a high pee-er) but it was fine.
I’ve had the Flip Top Cat Litter Box for 9 years and the cardboard liners work so well. So glad I can order them online as they are no longer available locally.