Aldo Cavini posted this on youtube in May 2007. In general, it's really hard to build a container out of repelling magnets. However, if you constrain the degrees of freedom the problem gets easier. The video of Aldo Cavini's amazing inverted pendulum, available on youtube. Aldo is happy for his work to appear here, but isn't comfortable enough with his written English to post himself: You can contact Aldo on his youtube ID: aldoaldoz