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Description
ferrofluide magnetique en bouteille decouvrez la scienceThe Magnetic Ferrofluid in a Bottle iron nanoparticles suspended in liquid, sealed in a glass bottle. Dimensions: 7. 2 2. 2 cm. 6 colors: Green, Transparent, Pink, Yellow, Blue, Orange. Comes with 2 magnets for immediate manipulation. Creates artistic and hypnotic shapes when in contact with a magnet. 6 available colors Green Transparent Pink Yellow Blue Orange Hypnotic shapes on contact Bring the magnet closer: the ferrofluid rises into spikes, forms
The Magnetic Ferrofluid in a Bottle — iron nanoparticles suspended in liquid, sealed in a glass bottle. Dimensions: 7.2 × 2.2 cm. 6 colors: Green, Transparent, Pink, Yellow, Blue, Orange. Comes with 2 magnets for immediate manipulation. Creates artistic and hypnotic shapes when in contact with a magnet.
6 available colors
Hypnotic shapes on contact
Bring the magnet closer: the ferrofluid rises into spikes, forms valleys, arches, and patterns that seem alive. Each manipulation creates a unique spectacle.
Suspended iron nanoparticles
Ferrofluid is composed of iron nanoparticles in colloidal suspension — they follow the magnetic field with fascinating precision and fluidity.
Ever-changing patterns
Each manipulation with the magnet creates a different pattern depending on the distance, angle, and speed of approach — the visual possibilities are infinite.
Stress relief & relaxation tool
Observing the hypnotic movements of the ferrofluid has an immediate calming effect — a silent and visual stress-relief tool for the office or home.
2 magnets included
Comes ready to use with two magnets — immediate manipulation upon opening the package. No additional equipment required.
6 colors — original science gift
Green, Transparent, Pink, Yellow, Blue, or Orange — choose the color based on the recipient's style. Ideal for curious teens and adults.
Glass ferrofluid · 7.2 × 2.2 cm · 6 colors · 2 magnets included · iron nanoparticles
Ferrofluid is one of the most counter-intuitive materials that exist — a liquid that behaves like a solid on contact with a magnet. Bring the magnet close to the bottle: the liquid comes alive, rising into irregular spikes, forming deep valleys, structures that seem to defy all logic. Move the magnet away: everything collapses and returns to a liquid state. In 7.2 × 2.2 cm glass, 6 colors, 2 magnets included — fluid physics made visible and contemplative.
📦 Content
1 ferrofluid bottle
Glass · 7.2 × 2.2 cm · color of choice
2 magnets
For immediate manipulation
| Materials | Glass + ferrofluid (iron nanoparticles) |
| Dimensions | 7.2 × 2.2 cm |
| Colors | Green / Transparent / Pink / Yellow / Blue / Orange |
| Content | 1 bottle + 2 magnets |
| Principle | Ferrofluid — suspended iron nanoparticles |
| Use | Science · stress relief · decoration · education |
For best visual effects: slowly bring a magnet closer and watch the spikes (Rosensweig instability) form gradually. Try two magnets simultaneously on either side of the bottle for more complex patterns. Illuminate the ferrofluid from the side with a small lamp to reveal the depth of the formed structures.
🎁 The most fascinating science gift there is: glass, ferrofluid, 7.2 × 2.2 cm, 6 colors, 2 magnets included. An original and memorable gift for a birthday, Christmas, or teacher gift — for teens and adults passionate about science and beautiful objects.
Frequently Asked Questions
What exactly is ferrofluid?
Ferrofluid is a colloidal liquid composed of iron nanoparticles (magnetite) suspended in a carrier liquid. These nanoparticles, about a nanometer in size, are too small to settle by gravity and remain in permanent suspension. When in contact with a magnet, they align and form the characteristic structures called "Rosensweig instability" — these regular spikes visible on the liquid's surface.
Why does ferrofluid form spikes?
The spikes (Rosensweig instability) form when the magnetic force exceeds the liquid's surface tension. Ferrofluid seeks to follow the magnetic field while minimizing its energy — the balance between these two forces creates the characteristic and regular structures observable on the surface.
Are the included magnets powerful enough?
Yes — the 2 included magnets are sized to create visual effects through the bottle's glass. For more intense effects or at a greater distance, additional neodymium magnets (sold separately) can amplify the formations.
Is ferrofluid dangerous?
Not under normal use conditions — it is sealed in a glass bottle. Avoid direct contact with ferrofluid (it stains and is difficult to clean) and keep out of reach of young children. Do not open the bottle.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.1 ★★★★★
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Product Reviews
★★★★★ 5
Great socks for the price!
Size: 6-10, Color: Black, Size: 6-10, Color: Black
I love these socks, they are perfect no shows but the material is thick enough for toes not too go thru. The grip is perfect and keeps the sock in place all day. I would definitely order true to size as the fit was perfect. I was surprised to find these socks at the price I did, especially when I got the socks in both black and white.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2025
★★★★★ 5
Best non-slip no show sock!
Size: 6-10, Color: Black
I love these socks! I wear them mostly with my slip on vans. The are thin so your feet can breathe (I hate thick socks). They have a grip on the heal so that they don't slip off of your feet, and it actually works! My only negative about these socks would be that if you have bigger than a size 8 foot, I would not purchase them because they do run a bit small. I wear a size 7 and they fit perfectly! They do look very tiny upon unpacking, but they stretch to the according size. I would also recommend letting them air dry after washing them and not putting them in the dryer. The first pair I purchased, I made the mistake of drying them and they shrank to an unbelievably small size. I've had my second set of socks for over 4 months now and have not had any problems since Ive been air drying them. I have not encountered any problems with them tearing as other have stated. Even though these are thin socks, they seem to be made quite well in my opinion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 5, 2022
★★★★★ 5
I buy these again and again through the years!
Size: Medium, Color: Austin Brown Assorted (6-pairs)
Love these. After a year or two I wear holes in the bottoms because I wear them so much. Worth the little bit higher price because of the fit and comfort. Love how they are truly no show
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Reviewed in the United States on October 18, 2025
★★★★★ 4
Good quality but tight on toes
Size: 6-10, Color: White/Assorted
These are great socks that stay in place, but they scrunch my toes together like crazy. My feet are normal width. When I first started wearing them I noticed my feet would ache after an hour or two.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
My New Favorite Socks
Size: 6-10, Color: Halo Gray/Assorted
These have quickly become mine and my mom's favorite socks. We wear them with tennis shoes, Hey Dudes, and more. The fabric is incredibly soft and comfortable, they do not budge/fall in my shoe, and are extremely well made. I have become so attached to these socks, that I no longer want any other brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 4, 2025
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