Colors: Glow in the Dark (expose it to sunlight, and watch it glow in the dark) 
Pen cap is able to post onto the back of the pen
Piston Filler Fountain pen.
Simply unscrew the end cap, dip into ink, screw back the end cap, and your done! Ready to write!!
Pen cap has an inner cap to insure a perfect seal when stored away. 
Made for the beginner who just wants to try out fountain pens, all the way to the experts. A good everyday worker.
 
The TWSBI ECO fountain pen boasts an incredible value with its piston filling system and affordable price. Like many other TWSBI fountain pens, it features a crystal clear acrylic barrel so you can see your ink level, and a purple cap and piston knob that both glow blue in the dark! The pen cap has an inner cap to ensure a perfect seal when stored away. It is completed with silver trim and a silver stainless steel nib.
Please note: Ink is NOT included