"Please check out kickstarter.com for WINKpens for all the details :) "

"Hi Daniel, this is Jessica Chan, founder for WINKpens. You're right on the piston. Those designs exist and for the reason that they work so well and easily, I've designed my pen to utilize a twisting refill piston as well. After testing a large variety and number of different designs, I narrowed in on one I feel is the best quality built by Diplomat. I'm working with them and we are having that component manufactured for the WINKpen. That piece sits inside our pen and the pen is built with a new feed system, replaces metal nibs with glass, and the cap fits securely so in short,  as a whole - you have a simple, new product that can adapt and take the higher viscosity of runnier inks, ultimately allowing you to use raw inks such as wine, juice, or tea :) "