Home Science Experiment: The Egg and the Bottle

Updated on February 8, 2019
theblackedition profile image

I love conducting my own home experiments, they always end up being so much fun.


This experiment is probably a classic home experiment that anyone can try. It doesn’t require much at all, but it’s really fascinating. The task is to cause a boiled egg to go through a narrower bottle opening without busting. Gravity alone won’t make this Humpty Dumpty fall! You’ll be manipulating air pressure within the bottle to make this work.

What do you need?

  1. A boiled egg, preferably hard. The soft boiled eggs may get messy.
  2. A glass bottle with an opening of diameter that is a bit smaller than that of the diameter of the egg.
  3. Lighter + Paper (depends on method used)
  4. Icy Cold Water (depends on method used)
  5. Warm Water (depends on method used)

How to Do It?

The Heating Methods:

Using a lighted paper

  1. After you have your egg boiled and ready, you can strip the shell away.
  2. Light the paper and drop it inside of the bottle.
  3. Place the smaller end of the egg into the mouth of the bottle.
  4. Watch to see the egg descend into the bottle as the bottle cools.

Using hot water

Instead of using the lighted paper, you could also use very hot water. Run hot water from a tap on the bottle, then place the egg (smaller end pointing down) in the opening of the bottle. Set the bottle with egg on a table and as the bottle cools the egg will descend through the bottle opening.

The Cooling Method

Instead of using warm water as described above, you would use cold water instead. Immerse the glass bottle into very cold water for a bit. Place the egg (smaller end pointing down) into the mouth of the bottle. Watch and witness the egg descending.

How Does All This Work?

The core of this experiment is based on manipulating air pressure in the glass bottle. Naturally, the pressure inside and outside of the bottle is the same. When you heat the bottle, you’re effectively heating the air inside the bottle. It is known in Thermal Studies that when you have a gas in a constant volume, and you heat it, you’ll increase the pressure of that gas. This means that the temperature of a gas is proportional to its pressure once its volume is kept constant. This is, in fact, Gay-Lussac’s Law.

By using the heating methods, you may find that the egg is being pushed upwards by the increased air pressure inside the glass bottle. Heated air rises and will escape thereby decreasing the pressure inside of the bottle. What will happen is that the pressure outside the bottle will eventually be more than the pressure inside the bottle, which causes a net force on the egg. The egg will be pushed inside of the bottle, and of course, gravity plays its role.

When the bottle is cooled, the temperature of the air inside the bottle is lowered. This means that there will be a drop in pressure according to Gay-Lussac. Here again, the pressure outside of the bottle will be greater than the pressure inside of the bottle. The egg will once again be pushed by the greater air pressure outside of the bottle.

So, What If You Want to Get the Egg Out of the Bottle?

The answer to this goes right back to the principle. If you can increase the pressure of air inside of the bottle, the egg will be pushed out. How to do this? Try blowing inside the bottle and allowing the egg to quickly fall into the opening (smaller part pointing out). It may require a little skill, but of course, this is not the only way to do it. Think about it :)


    0 of 8192 characters used
    Post Comment
    • theblackedition profile imageAUTHOR

      Shane Brown-Daniels 

      7 years ago from USA

      Oh that's great! Would love to know how it goes. Thanks Kate. :)

    • Kate Mc Bride profile image

      Kate McBride 

      7 years ago from Donegal Ireland

      I showed this to my sons aged 10 and 13- we are going to try it tomorrow.Voted this up and interesting and shared on facebook. Thanks for sharing this excellent hub.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, owlcation.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: https://maven.io/company/pages/privacy

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)
    ClickscoThis is a data management platform studying reader behavior (Privacy Policy)