The Range Kleen Fat Trapper Refill Bags are easy to use. Simply pour cooled cooking grease into the fat trapper bags by Range Kleen, then seal and replace the lid of the Fat Trapper in-between uses. It eliminates spills and odors, while protecting your residents' plumbing system. When the bag is full, simply remove, seal, and discard. As you know, grease blockages in sewer pipes are a direct result of grease that is poured down the drain. The Fat Trapper is the answer to proper disposal of unwanted cooking grease and is already in use by various Waste Water Departments around the nation to help them "Trap the Grease." Each bag holds 32 oz. of liquid and withstands hot liquids up to 150 degrees F. With the new fat trapper bags, you will need to fold in the sides to form a square such as the existing bag did. If you make a fist inside the bag and fold the sides it fits exactly in the Fat Trapper canister.