Pouring fats, oils, and grease down the drain can cause blockages as these items congeal and collect inside your plumbing, causing expensive repairs. You can dispose of fats, oils, and grease quickly and safely with Range Kleens Trap The Grease: The Fat Trapper System! The Fat Trapper System is easy to use. First, pour cooled cooking grease, oils, and fats into the bag, and replace the container lid between uses. When the bag is full of fats, oils, and grease, remove it from the container, fold the bag closed, lock tabs, and discard. Then refill your container with a new Fat Trapper Bag for your next round of grease collection.