Nyantomo Purr Fect Potty Deodorizing Litter Small Pellets Refill, 152.6 Cubic Inch Keep your home odor-free for a full week without changing the litter (when used by one cat) No clumps, no mess, no dust, no joke. #1 selling Cat Litter in the "Two Layer Type" Litter Category in Japan.* *Source from INTAGE MPI data (7/2011 - 6/2013), "Two Layer Type Cat Litter" Category, Accumulative Value base Small pellets are easy to paw (.16 Inch in diameter); Litter is easy to dig and easily buries waste; Covers feces fully Nyantomo is a product of Japan and is currently only available at Amazon.com