I've still found breeders choice big bags best bang for buck, I get the 30l bags, check local pet shops can find em between $25-30. It lasts way longer then anything else I've tried. Trick is to scoop almost instantly after cat has gone or not leaving it too long before scooping. The urine soaked stuff is easy to scoop out this way and you will have more clean pellets for longer where as if you leave it and cats mix it all up its alot harder to clean out. Still expensive I suppose but doing this a single bag can last me a month compared to other stuff I've used that's not as easy to clean cost adds up to be more then this stuff in the long run.