Abstract: A disposable litter container for pets, usually cats, includes a molded tray of water-absorbent paper material that does not lose appreciable structural strength upon absorption of limited quantities of water. The paper material preferably includes an appreciable wax content. The tray has a bottom wall formed integrally with side walls, enclosing a litter chamber, with the side walls extending upwardly from the bottom wall for a predetermined height greater than the litter chamber height. Lid retainers are molded into the side walls at the top of the chamber. A lid interfits with the lid retainers to seal the top of the litter chamber. There are complementary, interfitting supports on the lid and on the tray that adapt the lid to service as a base for the tray when the lid is removed. The lid can be replaced, when the litter is spent, to re-seal the container for disposal.