Soda Can Balancing Act

If you pour out or drink about 2/3 of a standard soda can, you can balance it on its edge.  Because of the shape of the can, it has two little ridges along the edge where it will balance if the center of mass is just right.  I recommend trying to balance it frequently as you consume the soda, because if you drink too much, it will not balance.  It's a great party trick and confuses little kids, which is always entertaining.