2B30.45a - Inverted Jug or Pitcher - Spoof

Fill the jug or pitcher with water.  This may take a while as the water you initially place into the jug needs to drain into the inner compartment.
Code Number:
Demo Title:
Inverted Jug or Pitcher - Spoof
Water Columns and Atmospheric Pressure
Area of Study:
Heat & Fluids
Jug and Pitcher with side holes.

Video Credit: Jonathan M. Sullivan-Wood

Fill the jug or pitcher with water.  This may take a while as the water you initially place into the jug needs to drain into the inner compartment.  When completely full, you may hold you finger over the outer hole and pour from the jug.  Only a small amount of water will come out unless you remove the finger that is covering the hole.  
If done properly, it will appear that you can pour out all the water from the jug, and that it will magically refill itself when you set it down on the table.

Fill the soda bottle with water holding your finger over the hole in the side.  Screw the cap on tightly and remove your finger showing that only several drips exit from the hole.  Loosen the cap and the observe the water stream.

  • Charles Vivian, "Your Magic Finger", Science Experiments & Amusements For Children, p. 62.
  • Bobby Mercer, "Super Squirt Bottle", Junk Drawer Physics, p. 164.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.