Famous Drinking Bird

Description

The Original Drinking birds are toy heat engines which mimics the motions of a bird drinking from a fountain or other water source. It is sometimes  considered a perpetual motion device.                               
When the head of the bird is moistened with water, then it will repeatedly bend down and appear to be drinking from a cup water which is in front of it. The dunking is due to the evaporating water, which cools the head reducing the pressure of the gas inside. The liquid inside the bird rises up from it’s tail toward it’s head, causing the bird to bend down and appear to be drinking. When the bird dunks, the liquid returns to it’s tail, and the process begins again. In essence this is a small, cleverly designed thermodynamic engine which only needs water to run!

Dimensions: 

• 7 x 2.17 x 2.02 inches approx
• Holds 1.55 oz

Package Includes: 

• 1 x Novelty Famous Drinling Bird