Any resourceful person will be completely won over by the Pen Printer. What designers Su-in Kim and Tae-jin Kim have proposed is using old ballpoint pens as sources of ink for the device, rather than expensive cartridges that never even fully deplete.
The wonderfully compact appliance is super slim and can be easily slipped into a laptop bag. It's powered by a computer, a tablet or a smartphone via a USB cable and it accommodates the standard A4 size of paper.
In terms of operation, take an old writing utensil that's either dried up or too runny and insert it into the round hole on the right side of the Pen Printer. Heat will extract the ink and the inner mechanisms will redistribute it precisely as text and images on your page.