Purizon 100% Plant Fibre Cat Litter

After weeks of testing all flushable cat litters, this one is the best value for money. There is a slightly sour smell here too, but it only appears after several days and it's nowhere near as strong as with other plant-based litters. It clumps well. The grains are quite coarse, so I treated myself to a scoop with bigger holes, which makes cleaning out the tray super quick now. An 8-litre bag lasts just under a week with five cats.