2.85mm PLA Coffee Infused Filament Composite - Natural Coffee. Wound Up™ is a coffee filled 3D printing filament made using waste byproducts from coffee. Wound Up™ uses those coffee left-overs to create a special 3D printing material with visibly unique print finishes. The filament produces products with a rich brown color and a noticeable natural grain. (Source: 3D Fuel)