Vacuum Bottle (Funky Physics Experiments)

You will need:

1. Glass bottle
2. Clay
3. Boiling hot water
4. Straw
5. Bowl

Create your very own vacuum bottle, by following this simple experiment, and amaze your friends by sucking in water into an empty bottle with the help of a straw.

INSTRUCTIONS

1. Ask an adult to help you fill boiling water into a glass bottle.
2. Let it stand for a few minutes so that the bottle may heat up.
3. In the meantime, take your clay and make it into a long rope.
4. Coil the clay around the centre of the straw tightly, so that when you
   place the straw into the bottle, the clay may seal the bottle.
5. Next, take your bottle and carefully pour out all the hot water into a bowl.
6. After all the water is poured out, quickly place the straw into the bottle and seal it with the clay.
7. Once you have sealed the mouth of the bottle with the straw in the centre of the clay, turn it over and place the open end of the straw into the water in the bowl. Now wait for a few seconds.

RESULT

The water in the bowl flows upwards against gravity into the bottle. This
happens because of the hot air trapped inside the bottle. As the hot air begins to cool down gradually, the pressure inside the bottle begins to fall creating a vacuum in the bottle. It thus pulls up the water in the bowl through the straw.