It works really well - especially with coffee & wine stains (quite familiar with those!)
Image courtesy of Amazon.com, where, yes, you can purchase them in 4 Packs!
Next up, how could I have possibly written about earth-friendly dental care without mentioning toothbrushes! I don't yet have a sustainably produced toothbrush, but when I need to replace my current brush, I am going to purchase these adorable and inspiring bamboo toothbrushes by Izola:
Finally, I just stumbled across this beautiful coat for sale on EthicalOcean.com. It is made of over 60% bamboo and is sweatshop/cruelty free and vegan: