petkit 5in1 mixed cat litter and air purifying refill bottles for petkit purax puramax self-cleaning cat litter box, 2 bags water dissolvable bentonite cat litter tofu litter is up for auction in Pet Supplies. The current bid is $8.50, 82% below the $47.99 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.