These disposable mixer trays make travel, cleaning and foaming time easy. Just save time by throwing away the box when changing boxes. Every time for your cat Hygienic boxes are available. Cat litter linings can also be used. Any type of cat litter that cats like can be used. Made from biodegradable recycled paper. These trays are compatible with any type of cat litter, and for extra cleanliness, a cat litter liner can be used. Whether at home or on the go, these portable litter trays make life easier for both you and your cat.