PERMA-lid & BAG-it Combo Waste Receptacle Replacement System for Littermaid Litter Box WILL NOT FIT THE NEWEST 3rd Edition Models No more spending money on receptacles - just use BAG-it and any plastic bag, like grocery bags BAG-it is a CLEAR retaining ring that fits inside a standard receptacle (not included) to hold open any plastic bag to catch waste. PERMA-lid is a heavy duty permanent lid that never needs replacing and is easy to clean. Installs in minutes without tools and fits ALL models of LitterMaid litter boxes. Search YouTube for "BAG-it for LitterMaid" to see it in action No special bags or liners required. You supply the litter box and 1 receptacle - then just recycle your empty grocery bags