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Cloud in a Bottle

Learn the science behind forming clouds, weather, and more with this kit


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Item #: WCIB-250

Usually ships the next day.

Recommended for age 8 and up with adult supervision.

Availability: In stock

This kit may not control the weather, but it might just be the next best thing.  This mind blowing experiment will show how pressure and water vapor in the air compress and expand in a small scale version of what happens in the atmosphere.  You'll make your own clouds and learn all about the science behind their formation with this great new hands-on kit.  Recommended for children ages 8 and up.

What's Included?
  • Clear plastic bottle
  • Foot pump
  • Rubber stopper
  • Safety glasses
  • Activity Guide
How Does It Work?

Cloud in a Bottle works by creating factors inside the bottle that are necessary for the formation of clouds.  Pumping air into the bottle introduces high pressure, and releasing the air allows the cloud to form. This kit is a simple, hands-on version of what happens in the atmosphere every day.

What Does It Teach?

Cloud in a bottle teaches the basic principles behind cloud formation and how it relates to high and low pressure.  

Customer Reviews

Clouds are awesome! Review by Gianfranco Herrera

Kids and staff love it. (Posted on 5/5/14)

Fantastic! Review by Shannon Berry

This worked exactly like it was supposed to. I purchased it for our school's Family Science Night, and my volunteer was able to get the technique for the perfect cloud after one or two tries. To be honest, we went right to the alcohol without trying the water, so I can't say how well it works with just water, but the alcohol was fantastic! I got a black background to really show off the cloud, but it wasn't necessary. I would buy this again. (Posted on 2/17/14)

Mom can we make a cloud again! Review by Eve

Rave rave rave reviews for the cloud maker. So much fun and my sn could put it all together himself (age 11) and he has been making clouds since and even made clouds with his fried who cam over yesterday. (Posted on 4/29/13)

Cloud Maker Review by Darren

Great product! Was excited to get it on sale.

Bad point was the tracking link did not work. Sent an email through the website and took 2 DAYS to get a response. In the mean time I just called to get the update on my order and see about tracking.

Darren -
Sorry about the time that it took to reply to your email. Remember, our offices are closed during the weekends and no one will be able to reply until Monday. Were the email sent during the week, there is definitely no excuse for the lack of attention. Again, we apologize for the hold up in communication.
- Steve Spangler Science Web Team

(Posted on 3/23/13)

OMG Review by kathy m.

This experiment has been enjoyable, educational, and down right fun for my school age students. Everyone can participate in making a cloud in a bottle. It even encompasses team work which is great. I would recommend this experiment to any teacher of school age children. (Posted on 3/2/13)

Amazed my class! Review by kathy wilmovsky

The cloud in a bottle worked great and kept my class impressed for a long time. The only negative is that it can be hard to get the stopper in the bottle and have a tight seal. Otherwise, it was a great way to talk about high and low pressure systems. (Posted on 1/28/13)

Cloud in a bottle is great experiment Review by DeLoss

My son is a weather fan and wanted to do something weather related for his 4th grade science project. The cloud in a bottle worked perfectly. Scientific, meteorological, and a little pop at the end to keep the kids interested! (Posted on 1/8/13)

Pilots Having Fun Review by Sue

The local chapter of the Experimental Aviation Association decided to hold a week-long aviation summer camp for teens, and I volunteered to teach some weather. I used the Cloud in a Bottle Kit, with a touch of isopropyl alcohol in the bottle provided, to demonstrate Bernoulli's Principal. Summer is too hot and humid here, to try the experiment with hot water. This was a fun project and everyone got a chance to participate. I used a cap left over from a soda bottle to capture the cloud, and say a few words about density and fog. The kids named the cloud George, before it was turned loose - by lowering the air pressure. (Posted on 11/17/12)

Wonderful! Review by Ann

I love this! I have had this for over two years. It is a hit with preschoolers all the way up to adults. Everyone loves the POP! when you release the pressure. The cloud is very visible and dramatic. This experiment very nicely shows the phase shift of water to water vapor with changing pressure. Think PVT (pressure, volume, temperature) diagram. On their own nchildren often come up with the idea of changing the liquid type as a experiment. They are intrigued to find that a milk, apple juice and grape juice clouds are white too. After seeing this they can often deduce that the water is the only thing that is vaporizing and that the molecules that give the liquid color are to "heavy" to be vaporized into a cloud. It is just a short step to then talk about salt water oceans and fresh water clouds. (Posted on 11/7/12)

Cloud in a bottle Review by Fitz

Awesome (Posted on 10/28/12)

Cloud Burst in a Bottle Review by Roger Davis

Very happy with this demonstration. Simple yet very "eye" catching. The underrated part is the "pop" that happens when you release the stopper after pumping up the bottle. Also, rubbing alcohol works better than water in making clouds form. I used this for elementary aged kids and they loved it. A little hard for them to use the pump, but otherwise its great. They seemed to really be more intrigued with the dissappearing cloud when pressurized again. Thanks Steve. (Posted on 10/5/12)

Pump Broke Review by Tristan

It works great, other than the fact that the air pump broke within a day and I had to fix it. (Posted on 8/9/12)

AWESOME! dont try and do it yourself this kit is worth it! Review by Amanda Parnell

I tried to make my own before I purchased this kit and it just ended up taking up a lot of my time. The stopper for the bottle is key and the pump itself is worth $20! I love Steve Spangler Science and plan on ordering more of his great products!! (Posted on 6/13/12)

Cloud in a Bottle Review by Patrice Massung

I really love this product. I used it with my kids at home and at school and everyone really loved it!! The students even wanted the name of the website so that they could find products too. (Posted on 4/16/12)

amazing!! Review by Jodi

very simple to do .. gives a big pop .. and wow .. the kids saw how pressure causes a cloud. (Posted on 3/6/12)

Cloud in a Bottle on 'Ask the Chief' Review by Jeff Cox

'Ask the Chief' is a monthly program that airs on WGXA-TV in Macon, GA, hosted by Chief Meteorologist Jeff Cox, and focuses on meteorology.

Thanks to Steve and his company. This worked great for us and our viewers! (Posted on 1/12/12)

Cloud in a bottle Review by Meghan Lockwood

This is such an amazing way to teach about weather. It brings it down to a scale that everyone can understand. I even understand the world a little better because of this! (Posted on 12/22/11)

Wahoo! It really works! Review by Jenny Brown

Once we got the hang of holding the stopper in place tightly, it worked beautifully. We also found that rubbing alcohol worked WAY better than water. Too cool! The glow in the dark paper we used in this video is also AMAZING! We use it all the time in Children's Church. It really gets their attention. (Posted on 11/21/11)

Cloud in a bottle Review by Alex Licairac

Awesome!!! Everything that I have bought from you guys (except for the Singing Rod that not even the instrument teacher can get to sing) has been a classroom and neighborhood pleaser. (Posted on 10/18/11)

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