I have used the plastic storage boxes like in your picture for litter pans, for years, actually the ones I use are a little longer. they take more litter, but for several cats , seems to work out well. Actually I just bought a regular sized litter box at the grocery store for only $3.49, at petsmart the same size is around $10.00. I am going to see how it goes, I still have some of the other ones around.

I use Tidy cats litter.