Nyantomo Purr Fect Potty Deodorizing Litter Large 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 Large pellets will not get caught in the cat's paws; Scattering is eliminated and pellets do not fly out (.24 Inch in diameter). Nyantomo is a product of Japan and is currently only available at Amazon.com.