egg-in-the-bottleEgg in a bottle is an easy-to-do classic activity, which you can perform in your kitchen. In this activity, a hard-boiled egg (peeled) is set on the mouth of a bottle and egg is sucked in the bottle magically (actually scientifically). You will learn how pressure difference can cause push and pull and helps the bottle to suck the egg.

Precaution: Always wear safety goggles and hand gloves when dealing with chemicals. Also, take the permission from your parents for the experiment, or involve them.

Things You Will Need

  • Boiled Egg (peeled)
  • Large-mouthed bottle ( a little less than the size of the egg)
  • Hot water


  1. Place the bottle on the table and fill it with hot water.
  2. After 30 seconds, empty the bottle.
  3. Quickly, place a boiled egg in the mouth of the bottle.
  4. Just wait!

As the bottle will become cool, your boiled egg will be sucked into the bottle.

What is Happening?

When you poured the hot water into the bottle, it raised the temperature of the air inside the bottle. Hot air expands, so some of the air escapes from the bottle. When bottle cools again, the air inside it also becomes cool. As a result, it contracts and pulls the egg down into the bottle. Since the egg is rubbery so it changes the shape according to the mouth of the bottle, and easily goes inside it.


Try It

  1. If you want to remove the egg from the bottle then hold the bottle upside down so that the egg falls on the mouth of the neck. Now, blow into the bottle with your mouth as hard as you can. The egg will start to come out of the bottle because the air pressure inside the bottle is higher due to your strong blow.