jrtom

http://www.boingboing.net/2007/06/08/supereasy_baggie_ice.html

I rather like the esthetics of the third solution, although I
don't eat ice cream much myself. Of course, I can easily imagine
Corwin wanting to make ice cream several times a day if we had one...

...

I've now read the FAQ on the website for the ball-shaped thingy. I
am disappointed to learn that despite how much it looks like a soccer
ball, they recommend that you not actually kick it. Clearly someone
needs to design a rubber exterior that you can wrap around the whole
thing while it's doing its thing.

I wonder how sensitive to ambient temperatures this method is.