During a retreat in a Zen monastery, I observed that Zen practitioners who want to own Oryoki bowls resort to bowls made of plastic or products made from wood scraps/wood flour (mahogany/mango or bamboo) that are pressed using water and energy must. 
The observation prompted me to make Oryoki bowls out of clay. 
I studied fine art at the Kunsthochschule Kassel and practice Soto-Zen at the Akazienzendo Berlin. 

Making Oryoki bowls is a way of life rather than a production of results. In this respect, I always do one set after the other.
There is no form of optimization of production or rationalization of processes.

The use of oryoki during sesshin provides an opportunity for us to deepen our practice.
Here you find a pamphlet to all practicing students.