Four Color Ooze Tube

This is a colorful way to demonstrate density, or just a fun desk toy. There are four chambers, each filled with a different colored liquid. Flip it over and watch the colors switch places, without mixing! Magic, or density?

3”widex5” tall x 1” deep, black and clear plastic, blue, green, red and yellow liquid. The colors flow differently and do not drip at the same rate.