This is a really interesting idea. Essentially, it’s a modern refillable fountain pen with interchangeable tips at each end. So, you can have a chisel tip on one end and a .1 fine tip on the other. The options are pretty endless and I love the idea of having a bottle of ink just casually sitting around.
![](https://www.gearjournal.com/wp-content/uploads/freshizer/959d0d32e429565d3af60e323dcb66ec_toms-540.jpg)