Upside down water glass trick.. IMPROVING A GREAT DEMONSTRATION

Improved versions of a classic demonstration, the simple water glass turned upside down has a new twist when a balloon is used instead of a flat card.. The seal is improved enough that the jar of water can shaken and spun around without the water being spilled out. The weight of water inside the jar causes a slight pressure drop inside the container. when turned upside down, with a lower pressure inside the jar, atmospheric pressure pushes against the covering, which in turn seals the opening of the jar so the water stays inside. This behavior would be similar to the action of a suction cup.

Special thanks to Homemade Science Junior (my granddaughter, Ella Yeany and friend.. watch at https://www.youtube.com/watch?v=QnKqM2uta_g

The original video was removed due to some questions about the explanation on the role of the cohesive forces of water and their role in the demonstration. I am exploring this further, and will post an update with additional explanations in a future video