Made from used Coffee cups. I collaborated with @gfsmithpapers to make this pen. They've invented a very clever process to extract the pulp from plastic in disposable cups. They then use the pulp to make their own glorious range of colourful papers. My personal fave and the one I made this pen from is called Aqua. It's also a bit of a cryptic link to @david.attenborough_official 's Blue Planet and a step in the right direction to minimising plastic that gets dumped in the ocean.
The finished fountain pen