http://www.catbedandtoy.com/worldsbestcatlitter/index.html - Disposing used cat litter is probably a very big issue. The WORLD'S BEST CAT LITTER is sewer and septic tank friendly, scoop and flush, is all you have to do .The moment any liquid mixes with WORLD'S BEST CAT LITTER, it is immediately absorbed and clumps up. But, when these clumps are introduce to water again, like when you scoop and flush them, the clumps disintegrate as soon as they hit the water. Definitely no clogging. Definitely no blockages.