An entirely appropriate material for the job.
Coffee cups made from old recyclable coffee grounds
Product designer Julian Lechner became obsessed with trying to find a way to reuse coffee grounds to create a new material. After 3 years of experimentation, Kaffeeform was born by creating a new formula that creates new products out of old coffee. Lechner takes recycled coffee grounds and natural glues to create a sustainable and eco-friendly alternative to products based on mineral oils. All Kaffeeform cups have the appearance of dark marblewood, smell of coffee, are very light, and finally, are dishwasher-friendly and long-lasting, so they can be used over and over again.
What a great idea. What else could we design in this way? Egg boxes made of egg shells? Edible cutlery?