The SWIPE is the newest model from TWSBI. It comes with three different filling mechanisms: a spring-loaded piston converter, a spring, and TWSBI proprietary ink cartridges. One of each is included! You can also fill the entire barrel with ink with an eyedropper.
This pen has a Prussian Blue body and clear grip section so you can see your ink flowing, and has a push/snap cap. It is completed with a silver stainless steel nib.
The SWIPE uses the same #4 size nib as the TWSBI ECO and the TWSBI GO. It can also accept standard international ink cartridges.