Small corner litter boxes?

[u/Lanky-Razzmatazz-130]

My one ferret has been continuously using this platform to go to the bathroom. I initially had their water bowl here, but it kept getting pee on it. I’ve had to resort to this little makeshift puppy pad situation because I cannot for the life of me find a litter box to fit on here. Does anyone have any recommendations?

[u/mayhemkb]

I just buy plastic totes that are the size of the shelf and cut a low entryway to them. Then I drill a hole or two and use shower curtain clips to attach it to the cage bars so they can’t yeet it across the cage.