Cat litter trays - Green Cat. Made from vegetable raw materials. The litter is processed so that the pellets have a sponge-like structure with a wide surface area for moisture absorption. Economical and environmentally friendly. The pellets are very light, making them easy to move and dispose of. Hardened balls can be disposed of in the toilet as they will dissolve just like toilet paper! Advantages. Quickly clumps. Low dust. Safe for your cat and the environment.