These coasters are made from 100% recycled PP, collected from own garbage and melted into a form. It can stand the heat of hot metal, thus perfectly as coaster for teapots or cooking pan. When it is at his end of life, it can simply be shredded again to make a new coaster.
Separating different types of plastic, since they have different melting temperatures and behaviour.
Experimenting with self-made moulds
Finished prototype - ability to withstand hot teapots