A buddy used to take a small plastic jar of chunky peanut butter, remove the lid and put a screw with a large washer through the underside of the lid and into a tree about 2 1/2 ' off the ground. Then he'd remove the foil seal, screw the jar onto the lid on the tree......and cut the bottom of the jar off............he swore that within a couple days the jar would be empty and spotlessly clean!