This is my TWSBI Eco fountain pen. This pen is not as attractive to me as my conventional pens because it is a demonstrator pen. A demonstrator pen is made of clear resin so you can see the inside of the pen, its piston mechanism and ink flow. I have this pen loaded with Pelikan Edelstein Topaz ink which is a very pretty blue. The more I use this pen the more I like it. It is a smooth writer and allows good ink flow. I ordered the medium nib which seemed too wide for me until I found this ink that works well with the wetter nib.  

A side note. Had to replace my water heater on Thursday. I have been wanting to replace it for the past year as it’s somewhere between 16 and 18 years old. The last thing I need is to have it break down and deal with flooding. On Monday it began making unfamiliar noises so I called to have it replaced. There is a sigh of relief but also a cringe because my wallet it $1150 lighter which means a delay on the next camera lens. 🙁