Rheoscopic solution is a pearly-white, water based solution that can be used to demonstrate concepts that are usually difficult to see such as: ocean currents, turbulence, and convection. Adding food coloring to color the solution will make it even easier and more exciting to simulate oceanic and atmospheric patterns. 1L concentrate makes 62.5 liters DOT Info: Non-regulated WARNING: This product can expose you to chemicals including Ethylene oxide, which is known to the State of California to cause cancer and reproductive harm. For more information go to http://www.P65Warnings.ca.gov.