A Tantalus cup is a glass cup with a U-tube attached. When water reaches the top of the inverted U-tube, a siphon action begins which drains the water until the end of the U-tube is exposed. When the cup is filled with water, the water is forced up the inverted U-tube so that equilibrium is maintained in the cup. As the water level reaches the top of the U-tube it begins to fall through the siphon. As the water falls, it creates a vacuum which causes more water to be forced into the tube. Instructions included.
WARNING: This product can expose you to chemicals including benzene and lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
This product contains latex, which can cause allergic reactions in some people. If symptoms of an allergic reaction occur, stop use immediately and consult a physician.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.