The Playtex Potty Genie Disposable Refill Liners contains two rolls of liners to be used with the Playtex Potty Genie 3-in-1 Potty Trainer. This pack contains 40 lightly scented liners that help to control odors. As part of the Potty Genie system, these liners help to ensure a hassle-free potty training experience for parents, too, by making it easier to clean up after your child as they learn to use the floor potty as a first step in potty training.