1) Use any milk or juice container with a screw cap. Wash the container well and let dry. Open the top of the container, this will make it easier to trace the template in the next step.
2) Trace template onto container with a sharpie or pen then cut out along the lines. Use sciscors or an exacto knife to cut out the hole.
3) Fan fold (fold back and forth) the half circles.
4) Press closed and fold over flap. You may have to make the hole a little bigger to fit over spout. Add cap to hold purse closed.