zerowaste @slrpnk.net nautilus18 @slrpnk.net 2y ago 3D printers and coffee grounds https://arstechnica.com/science/2023/09/dont-throw-out-those-used-coffee-grounds-use-them-for-3d-printing-instead/
https://arstechnica.com/science/2023/09/dont-throw-out-those-used-coffee-grounds-use-them-for-3d-printing-instead/