Case I Want is a browser based service from Poland to create your own, unique housing for your smartphone. They are also working on recyclable wood material for wooden cases. Looks like a interesting business model. Also, Poland seems to be full of 3d printing companies and DIY projects. Why is that? I will try to research it in the future ...
http://caseiwant.com/home/
Here is video from their crowdfunding campaign with more details but in Polish:
They are fundraising on Polish platform, go there and help them:
https://wspieram.to/caseiwant