The vortex valve is designed to demonstrate how a tornado swirls. Use the valve to connect two large soft drink bottles. When one is half filled with water, with a flick of the wrist a tornado in a bottle is created. Scientific fun! Sold Each.
The vortex valve is designed to demonstrate how a tornado swirls. Use the valve to connect two large soft drink bottles. When one is half filled with water, with a flick of the wrist a tornado in a bottle is created. Scientific fun! Sold Each.