Haspi Products’ KittyTwister is an upscale litterbox that features an innovative sifting tray. The round, enclosed litterbox has a round sifting tray with high walls and handles. The sifting tray works by lifting it and twisting it back and forth. A funnel makes it easy to pour out the litter clumps. The litterbox is made out of a high-quality, high-polish polypropylene plastic that is impervious to urine and chemicals, and resists odors. The KittyTwister Trio litterbox comes with the sifter and scoop. The company also sells a litterbox model without the sifter, KittyTwister Duo. It comes with just the scoop.