Most people who share their lives with cats must also deal with a cat box. Keeping the box as clean and fresh as possible is desirable for both humans and cats sharing a household. Clumping litters became so poplar because they made cleaning the box eaiser and more economical, but, as we now know, they bring with them a price too high to pay. Innovative manufacturers have come up with different kinds of solutions to the cat box problem; on this page are descriptions of some of the possibilities.
Once upon a time, there was The Eliminator. The Eliminator was a unique two-piece cat box that used plain clay litter (only; clumping litter was too fine for it). There was an upper half with rectangular openings in the bottom, and a lower half with a solid bottom and slits on the sides. The litter sat in the upper half, while any fluids that escaped the clay dripped down to the lower half, where they could evaporate. Air flow through the slits in the lower half aided in the evaporation. The fact that the urine evaporated is what helped keep the entire contraption odor-free.
The manufacturer claimed that, because of The Eliminator's unique design, a ten-pound bag of clay litter would last for up to six months for a single cat (up to four months for two cats; up to three months for three cats). The manufacturer didn't recommend using any of the newspaper-based litters, and after trying The Eliminator myself (and testing it with a newspaper-based litter), I concurred. However, used with clay litter, it definitely worked as advertised. However, we had more cats than could be accommodated by the test model, and we didn't have the room to place more boxes, so we ceased the experiment. Others who have written to me about this box liked it very much.
The original manufacturer was Green Earth Technologies. Although this cat box is no longer being manufactured, it looks as though the Smart Cat Box (“uniquely green and easy to clean”), which uses safflower seed as the litter, uses a very similar concept. This box is said to be especially useful for diabetic cats.
If you use a LitterMaid automated cat box, which is designed for use with clumping litters, I have been told that it works well with the alternative clumping litter, The World's Best Cat Litter (but not with SWheatScoop, which I have heard sticks too much).
The LitterRobot claims to work with any clumping litter as well.
Though you might want to read this amusing cautionary tale about automated cat boxes before investing your money.
I once tried to toilet-train my cats, with some success. I had to stop the experiment before it was complete, but I think it could work. Here is a product that may well make the process easier than it was when I was trying to do it. They recommend using this product with a crystal litter product, but of course I cannot recommend those products due to health concerns others have raised. Also, some people have raised some questions about flushing kitty feces if the results end up in the ocean.
Several manufacturers make furniture that you can place your cat boxes in. Here are a few links: