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  • Pearl Swirl Rheoscopic Concentrate

Pearl Swirl Rheoscopic Concentrate

Quick Overview

Concentrate Formula! Makes 2 gallons of rheoscopic fluid.

Availability: In stock



New Concentrate Formula - Makes over 7 liters (2 gallons) at a fraction of the cost!

Pearl Swirl™ Fluid is the secret ingredient that gives some shampoos that pearly-white look or creates wave currents in some shake-up water toys. In scientific terms, Pearl Swirl is a rheoscopic fluid, but it's a concentrate that makes over 7 liters (2 gallons)! When added to water (or other liquids), it allows you to see the movement or currents in the liquid. This pearly-white, water-based suspension is safe and non-toxic and excellent for teaching units on ocean currents, aerodynamics, turbulence, convection, and many other motion effects that are often difficult for students to visualize. Pearl Swirl is safe and fun to add to many liquids to create a pearly-white effect. Recommended for children ages 4 and up.

What's Included?

  • Pearl Swirl Concentrate - 4 oz (120 mL) bottle
    • Enough Pearl Swirl to make 2 gallons (7 liters) of rheoscopic fluid
  • Baby Soda Bottle with cap
    **Bottle cap color may vary.**

How Does It Work?

You’ve undoubtedly seen Pearl Swirl in shampoos, lotions, cosmetics or even water toys. Pearl Swirl contains suspended microscopic particles that make it easy to visualize currents and the flow of a liquid.

What Does It Teach?

Demonstrate ocean currents, aerodynamics, turbulence, convection, erosion, and other movements of nature that are difficult to see. This pearly-white, water-based suspension can be colored with a few drops of food coloring to make it even more effective. Simulate oceanic and atmospheric patterns that will encourage your students to experiment. A science activity guide provides great ideas for demonstrations and science fairs.


  • Add 1 tablespoon of Pearl Swirl concentrate to a 1-liter soda bottle filled with water.
  • Add a few drops of food coloring to spice things up (blue makes an excellent ocean color)

More Ideas

Additional Information

Product FAQ
  • Is it toxic?
    It is non-toxic but doesn’t make a very good beverage.
  • What does it teach?
    It demonstrates different types of convection currents that are hard to see otherwise, such as ocean currents, aerodynamics, turbulence, and convection.
  • How much does it make?
    This little 4 oz bottle makes 2 gallons. That’s quite a punch!

Product Tags

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  1. Beautiful! review by Mom on 4/8/2013

    This is a beautiful product, so fun to make and watch.
    Thanks Steve Spangler for offering it!

  2. Fun for all ages! review by Ann on 2/19/2013

    My children and I like this product. This is one of those products that can be used in a variety of ways - as a creativity prompt, a way of eliciting descriptive words (adjectives) or a science demo. One afternoon in particular comes to mind, we took a small tub and filled it with an inch with blue pearl swirl water and then used plasticine clay to form land masses in the water. The kids then had a whole world for their small figurines to explore. They sailed ships, colonized new islands, watched the "ocean" currents, etc. It was after this that my then 4 year old was fascinated by the muddy currents that her bicycle created as she road through it. A year later she is still using the words "currents" and "eddys" correctly. I guess it stuck. :-)

  3. Amazing !!! review by Martin, Quebec, Canada on 1/7/2013

    It's a lot of fun and good learning experiences for kids and adults too. We find new ways to experience pearl swirl. Everyone can discover a thing or two about convection currents; seeing colloidal suspension with a laser ( in relation to dust in the air ). I assure you, it's hours of fun and everybody will love that product. It would be great if Mr Spangler would sell a larger bottle ( 500ml or 1 liter ) of pearl swirl, we could buy less bottles for the same quantity of the product.

  4. Loved it! review by Lara on 11/27/2012

    I was hoping to purchase some sensory tubes for my students but found they were cost prohibative. While exploring the site, I found the rheoscopic liquid and it made my day! My students are fascinated and spend time looking at the swirls and mixing their own. The fact that it can be added to any colored liquid just makes it better! Tons of vocabulary and observation!

  5. Awesome and Many Uses review by Liz B on 10/3/2012

    This stuff is great. My classroom has used it with Instant Worms, Slime, Goo, etc. We love putting in in test tubes! This stuff is awesome.

  6. A Great Time review by Grace Wittkopp on 9/17/2012

    We had a great time with the Pearl Swirl at preschool. We used it during ocean week to make our own little oceans in a bottle. We even added fish stickers to decorate them. I am not sure who was more excited about them, the children or the parents. I think we may have to have a parent night and let them make one to take home so they aren't always playing with the one their child made. Thanks. We are just waiting for the snow in Ohio to subside so we can make bracelets from our color changing beads.

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