The Egg in the Bottle Trick
Use air pressure to squeeze a hardboiled egg through the mouth of a bottle.
With just a few household items, we can show you how a hard-boiled egg can squeeze right through the mouth of a bottle. The Egg in a Bottle Trick is a science classic, dating back at least a hundred years. It's a brilliant method of teaching just how powerful air pressure can be and the trick is also a great way of messing with your friends. We won't stop there, we'll also show you how to perform a gravity defying version of the trick… it's an "eggsclusive" upside-down twist!
- Hardboiled eggs (peeled)
- Large-mouthed bottle
- Matches or lighter
- Strips of paper
- Small birthday candles
Before starting the experiment, make sure that you have a few hardboiled eggs and a large-mouthed bottle. The mouth of the bottle should be just large enough to let a hardboiled egg sit snugly in the opening.
- Using a pair of scissors, cut a strip of paper about 8" x 1."
- Carefully use a match or lighter to light the strip of paper at one end and drop it into the large-mouthed bottle.
- While the strip of paper is still burning in the bottle, set an egg on the mouth of the bottle.
- Watch carefully! With the egg sitting atop the bottle, the burning strip of paper extinguishes itself.
- Keep watching! The hardboiled egg slowly, then quickly, squeezes through the top of the bottle and drops to the bottom. Whoa!
- Want to do the experiment again? You'll need to get that egg out of the bottle. Be extra careful doing this!
- Turn the bottle upside down.
- Put your mouth on the mouth of the bottle and forcefully blow air into the bottle. It shouldn't take much!
- The egg will pop out of the bottle just like it popped into it!
- Carefully push two or three small birthday candles into the narrower end of a hardboiled egg. Make sure the candles can fit easily inside the large-mouthed bottle.
- Light the candles and sing a quick happy birthday song to the egg.
- Turn the large-mouthed bottle upside-down and slowly put the candles inside the mouth of the bottle.
- Allow the flames to heat up the air inside the bottle for just a few seconds and then place the mouth of the bottle against the egg. The candles will go out and with a "pop!" the egg will squeeze up into the bottle.
- Carefully fill the balloon with water so the balloon is about the size of a tennis ball. Tie it off. Make a few balloons just in case the first one breaks!
- Before going any further, make sure that the water balloon is slightly larger than the mouth of the bottle.
- Smear some water around the mouth of the bottle.
- Set a strip of paper on fire. Quickly put the burning strip into the bottle. Be careful you don't accidentally burn your fingers.
- Immediately cover the mouth of the bottle with the balloon. In just seconds, the balloon will start to wiggle around on the top of the bottle, the fire will go out, and some invisible force will literally “push” the balloon into the bottle. That’s amazing!
- Now that you've mastered the trick, it's on to the next challenge. Can you get the balloon back out of the bottle? Use what you learned about air and air pressure to come up with a way to get the balloon back out. Here's a hint... Try sneaking a straw alongside the balloon when you pull it out. If the outside air can get inside the bottle, the water balloon will come out!
How does it work?
Consider including in the directions...
Heather R. - February 18, 2013
1) A notation to peel the egg.
babay - October 22, 2012
i remember that i did this trick in 3rd grade!!!!!!
egg in the bottle trick
pooh - September 11, 2012
okay my science teacher is doing this experiment and we have to find out the reason for the egg falling in the bottle and this goes perfectly with it! thanks for making this video it helped so many people :D
Pat - January 8, 2012
My son did this project in the eighth grade and he made an A on it. He now has a project due in the tenth grade and he wants to do this one again. We loved it so much that we are about to do it AGAIN!!! Simply awesome!!!
miranda - October 8, 2011
I'm doin a project in science on how science doesnt suck things in. this goes with it perfectly!
Christ Lopez - May 29, 2011
This experement was and is really cool. i just tried it and its really easy to do.
Leidys FL - November 22, 2009
This is amazing! I'm doing it and it's a lot of fun. Also when I watched the video it was really amazing how the egg came out :)
Egg into the bottle with fire
Sally Montana - October 10, 2009
It really works!!!!!!!!!!!!!!!! My kids loved this experiment!!!
Always a hit!
Laura Parker, CO - October 4, 2009
Kids AND adults love this. I have also done it with a glass widemouth salad dressing bottle. If you don't want to worry about the flame inside the bottle you can also use rubbing alcohol and drop the lighted match in the bottle. The flame goes out and the egg sucks right in.