cat litter box.... Every cat person i know should have this. It has got to be the most hygienic liter box solution, EVER! especially since the only way to know if your cat has toxoplasmosis is by getting it tested, indoors or outdoors.
Ikea hack: a kitty litter box with an intermediate "carpet room" to get the rest of the litter off their feet before they exit. Complete with storage shelf, automatic lights and a "made to fit" kitty litter tray!
DIY top loading cat litter boxes! I bought two 18-gallon plastic storage containers with lids (about $7.50 each). I decided I liked the idea of using the lid to trap the spare litter crumbs, so I bought 2 feet of grey stair-tread carpet($4) to adhere to the lid with some carpet adhesive double stick tape. My total material cost for TWO boxes was less than $25 — a fraction of any of my store bought options.