You can now drink coffee from coffee cups--literally! After 5 years of research, Julian Lechner hit upon a formula that works. He combined used coffee grounds from cafes in Berlin with glue and wood to create Kaffeeform Cups--espresso cups that are made of compressed coffee grounds.
The combination forms a liquid that Lechner injects into a mold, then seals with a waterproof resin. Despite this industrial processing, the cups still smell like coffee. They're sturdy enough to withstand a dishwashing machine and have already been tested for durability in a commercial cafe.
-via Unconsumption
These Coffee Cups Are Made of Coffee Grounds