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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.
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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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4.8 ★★★★★
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Product Reviews
★★★★★ 1
Ripping with minimal wear.
Size: 8, Color: Black/Black, Size: 8, Color: Black/Black
I really wanted to love these. This is my first pair of HeyDudes, and I am pretty disappointed. I don't have wide feet. They fit perfectly, and were super comfortable. But they are already ripping and I haven't even worn them 5 times. I didn't even wear them long or walk a lot in them.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Perfect everyday Watch
Color: Grey, Color: Grey
Super happy with this watch. It looks really clean and goes with pretty much anything dress it up or wear it casual. The blue face is fire in person and catches the light really nicely.
Feels solid on the wrist, not too heavy, and the quality is definitely there. I’ve been wearing it almost every day and it still looks brand new.
For the price, you really can’t beat it. Great everyday watch that looks way more expensive than it is. Would 100% buy again
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Stylish and inexpensive
Color: Grey
Great watch. Came in quickly from seller. Got it sized at a local shop. It’s a pretty stylish watch for the price point. I don’t have big wrists but I still think the face could be a little bigger. But it’s pretty sleek and I’m happy
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Reviewed in the United States on August 24, 2023
★★★★★ 5
Style and elegance
Color: Grey
Excellent
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Certainly a great buy
Color: Grey
Why did you pick this product vs others?:
It is a very well known and respected brand. Additionally, this particular watch is beautiful. I can not be happier.
Value for money:
Value for money is certainly great than with many other Swiss made watches.
Accuracy:
very good: -4 to +5 seconds per month.
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Reviewed in the United States on June 23, 2025