Environmentally friendly sponges from 100% jute yarn

I have been annoyed for quite a while with today's sponges for cleaning: 

most are made of synthetic materials. This means that when we rub, small synthetic particles end up in and harm the environment. 

That's why I have researched environmentally friendly alternatives from natural materials, and this is my favorite: 

I crocheted this one from 100% jute yarn. I love it!