This is a great alternative litterbox that was not primarily designed to be a litterbox. It's actually an industrial stainless steel steam table pan. Yep, this "litter box" was made to prepare and serve food!
Stainless steel seems like a no-brainer material for a cat toilet. I mean, it's stainless! Metal boxes are easy to clean and won't retain odors. This box is very close in dimensions to a large standard litter pan you'd find at any pet store. The box measures 20.9" by 12.9" by 6.1". The pan has a small outer lip that is curled under at the edge, so it's safe for your cat to enter and exit. The strong box is also surprisingly lightweight, making it easy to work with and clean.