The Catsan Smartpack is a really good thing! But unfortunately it's not available everywhere.
There are these bags for the litter box, which are also very practical and I always have some at home in case I don't get a Smartpack.
Wouldn't it be very practical if these bags were offered with a fleece inside, like the Smartpack bags?
That way you have the extra absorbency and odor control of the Smartpack, but you can fill it with the cat litter of your choice!
That way you would always have a good alternative to hand!