I am pretty sure this is the one I've been using with Naddy and gang. If so it's available at Pet Valu. It holds the odour well but I find with 7 kitties using it it needs to be completely changed out every two or three weeks. If you are only using it for a couple it should be good for the month or so it says before completely changing it. Not like clay stuff which needs to be completely changed every week.
