I have used this container for 5 litter boxes by cutting partway down from the top leaving a 3.5 inch depth. It is the BEST litter box I have ever used. Super easy to clean, keeps the litter from spilling all over, and does not have any groves in the bottom where used litter might stick. Yes I know you make litter boxes, but this superpasses all due to the smoothness of the plastic, the height, and ease of cleaning. we have a total of 12 cats so these have been extremely helpful. 
So glad I found this use for this product.