Cora Ball

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The Cora Ball is a human-scale solution to microfiber pollution that both catches fibers before they And, remember, what they eat, we eat.

Our clothes are breaking up into tiny pieces and flowing out our washing machine drains into public waterways. This will prove to be the biggest pollution problem facing our oceans and poses a danger to creatures at every level of the marine food web. We learned about this problem during our work on marine debris and realized there needs to be a solution as soon as possible. The Cora Ball is inspired by, and named after, coral. To fight this problem at the consumer level, we need to stop these microscopic pieces of fiber from escaping our washers or sticking to our clothing in the first place. a standard filter can't do it - because if it were small enough, the water would not flow. Coral does exactly what we need - water to flow, and to catch small things from that flowing water. The Cora Ball is a human-scale solution. It is very easy to use - you just drop or throw it into any washing machine and she will do her job collecting these unseen fibers into fuzz balls that are easy to remove. When you see a fuzz ball on the Cora, you just pick it out and throw it away - the same way you'd clean a hairbrush. We hope you'll join us in protecting the ocean with every load of laundry.

06/23/2026

Reducing microplastic exposure starts with the food we eat and how its prepared. You can trust our 100% Vermont maple cutting boards are made of a single plank, without any glue, oil or wax. And did you know wood is naturally antibacterial?

It's time to swap out your plastic cutting boards with the safer, healthier option. Visit coraball.com or use the link in our bio today!

04/29/2026

Come out tonight to the Library for an author talk with ! Discuss Decision-Making in the Age of Plastics, challenges you've faced and solutions you've found.

7-8pm in Hinesburg, VT

Books, Cora Balls and single-plank cutting boards will be available for purchase.

04/22/2026

🎉24-hour Earth Day Sale! Get 10% off your entire purchase with code EARTHDAY. If you've been waiting, this is your time to bring Cora Ball home!
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Use a Cora Ball to protect the ocean and your clothes from microfiber pollution.
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Protect the earth, it's creatures and ourselves from tiny, unseen bits of microplastic through everyday choices with Decision-Making in the Age of Plastics.
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Learn more at coraball.com.

04/21/2026

An Earth Week throwback to this microfiber article by Jennifer McDermott, a journalist for the Associated Press. Once again, a huge thanks to the AP for featuring Rachael Zoe Miller and Rozalia Project's work to understand microfiber pollution and spread the actionable changes people can make to be part of the solutions!

We need more awareness of this problem in order to influence policy and industry changes before clothing is available to purchase in store. Share this story to help us increase awareness and positive changes this Earth Day!

Plastic is everywhere — and yet some people may be surprised at how much they actually wear. A typical closet is loaded with plastic, woven into polyester activewear, acrylic sweaters, nylon swimsuits and stretchy socks.

04/09/2026

Come out for an incredible night of science and music at the Science After Hours! 🎶 🎵 🥁 🔬⚗️🧪

Witness a live demonstration of the invisible fiber explosions happening all around us with ! 💥💥💥

April 10, 7:30-11:30. Ages 21+. Purchase tickets at bit.ly/3OYWWqf (link in bio).

03/06/2026

Check your Sustainable Laundry Score! How did you do? Share your tips in the comments so we can all improve together!

Shop for Cora Ball, detergent, soap sticks and dryer balls at coraball.com and save on your sustainable future when you bundle them together!

01/10/2026

Rachael Zoe Miller was on the Vermont Edition radio program to discuss her book, Decision-Making in the Age of Plastics! She and host, Mitch Wertlieb, had the best conversation about the book and talked to fantastic callers. The conversation highlighted the challenges our neighbors face as they strive to make healthy, sustainable choices, as well as sharing tips on how to solve or research unique problems by town or region.

Listen to the program on Vermont Public!
https://www.vermontpublic.org/show/vermont-edition/2025-12-30/decision-making-in-the-age-of-plastics

12/10/2025

Rochester Public Library is the first community library to have a copy of Decision-Making in the Age of Plastics!

On Sat. December 13th 10-11am, Rachael will lead a discussion about how we can all navigate acquisition decisions in a way that is best for each of us as individuals. Join us there to get your copy of the book signed!

11/29/2025

Unlock free gifts with your order this holiday!

Learn how at corball.com. Link in our bio.

Address

222 N 20th St
Philadelphia, PA
19103

Website

http://coraball.com/

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