Which retail innovation first introduced the concept of 'zero-waste grocery stores' where customers bring their own containers for natural products?

The natural products industry has seen remarkable innovations in sustainable packaging and retail strategies over the past decade. Companies are increasingly finding ways to reduce environmental impact while enhancing customer experience. Test your knowledge about a groundbreaking retail innovation that changed how natural products are sold and packaged!

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Unpackaged (London, 2006)
The Bulk Market (San Francisco, 2010)
Original Unverpackt (Berlin, 2012)
Lush Cosmetics' 'Naked' stores (Milan, 2008)