You will need:. Clean 1-liter soda bottle. Craft knife. 2 wooden spoons. small eye screw. Length of twine for hanging. Instructions. Draw a 1/2-inch asterisk on the side of a clean 1-liter soda bottle, about 4 inches from the bottom. Rotate the bottle 90 degrees and draw another asterisk two inches from the bottom. Draw a 1-inch-wide circle opposite each asterisk. Use a craft knife to slit the asterisk lines and cut out the circles (a parent's job). Insert a wooden spoon handle first through each hole and then through the opposite asterisk. Remove the bottle cap and twist a small eye screw into the top of it for hanging. Fill your feeder with birdseed, recap it, and use a length of twine to hang it from a tree..