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321 Water

The story of something that’s more than just a water bottle.

Since appearing on the ABC’s New Inventors program in July 2009, Gretha Oost and her 321 Water bottle have been getting closer and closer to production.

While there are a number of well-designed water bottles out there, Gretha’s design integrates a ‘tree-like’ water filter into the body of the bottle, turning it into a design feature.


The design grew out of a passion to see less plastic water bottles going to landfill. To encourage people to use 321, there was a need for it to provide filtered water – one of the reasons a lot of people buy bottled.



It’s rare that a product that hasn’t even entered production gets a lot of pre-orders, but through her ‘Thirst for Change’ program (and investor funds), Gretha has been able to whip up almost 8000 purchases, helping the bottles to enter production.

Designed in collaboration with Charlwood Design, 321 Water has been a few years in the making, but it’s almost here and we can’t wait to see it.

In another collaborative approach, the packaging for the replacement filters will be housed in their own special box designed by Tim Fleming of Flatland OK.

To pre-order visit the 321 Water website.


321 Water

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