This portable kitty litter box is lightweight and very easy to set up and fold back down while traveling. The crystals are the same type we use for our kitty's permanent litter box, and they absorb smell and liquid quite well and last up to a month before needing to be replaced. The disposable scoopers are perfect for one-time use. We have 4 cats and have not traveled with all of them. Our largest, at 16-pounds, might not fit inside the box. Also, a plastic liner in the bottom of the box might be useful for longer trips, but was not necessary for our purposes. [This review was collected as part of a promotion.]