I use coffee filters a lot but I never thought about using the used ones for art projects instead of throwing them away. Recently, I made a pot of loose-leaf tea and as I was about to throw it away, I thought to myself "I wonder if I could doodle on this." So I turned away from the trashcan and sat down at my desk instead. I decided to do a zentangle-inspired piece.
This is how it turned out:
I used black, white, silver, and gold Uniball gel pens. I think in the future I'm going to try using watercolors on my next coffee filter doodle. If you try this at home, be aware that the ink will bleed through the coffee filter a lot. I recommend putting a piece of paper under it if you want your workspace to stay clean.