Draw a straight line from the outer edge of the circle to the inner edge and cut along it.
How to make a small funnel with sheet metal.
Wrap the foil around the model to create the foil funnel.
Mark an 8 inch circle on a piece of sheet metal.
Thanks for the help.
Tape the other end of the foil together to complete the funnel.
You may want to line the entire edge with tape to ensure it fully adheres.
In the center of the circle measure a 2 inch circle and cut this out with the tin snips once more smoothing the edge.
Cut around the circle with tin snips and smooth the cut edges with sandpaper to remove all the burrs and sharp points.
Remove the tape from the inside of the aluminum foil funnel to release it from the cardboard model.