a.k.a. Kaos
Patented by C. Hausammann 1993.
(plastic, 7 inches)

The top and bottom halves of these tubes can be rotated with respect to each other, and the balls can be shifted back and forth. Jaap's Page gives a solution. This puzzle was made in a number of versions that are the same except for the color of the balls and the packaging.

Further Reading
Jaap's Page, from: http://www.jaapsch.net/puzzles/chaos.htm
Hausammann Patent, from: www.uspto.gov - patent no. 5,176,382