The Agma Trivets by UK-based Swiss designer Valentin Bussard are made of ash wood and felt, stackable with four color and two size.
Inspirtion from designer:
Created through the scrap wood pragma project, or its current name AGMA waste wood are simply glued onto the felt. Combinable and stackable to meet all your sizes of dishes and take up less space in storage.
PRAGMA Breadboard and knife by same designer