TWSBI Eco Fountain Pen - Rootbeer with Bronze Trim and Nib
A warm amber Eco with a cola finish
The TWSBI Eco Rootbeer with Bronze is a piston filling fountain pen in a warm amber-brown transparent resin, with cola-like undertones. It uses the standard Eco piston system, giving it high ink capacity and full visibility of ink inside the barrel. The bronze trim adds contrast to the warm body colour.
What sets it apart
- Warm rootbeer inspired amber-brown transparent resin
- Bronze coloured trim for contrast against the body
- Part of the Eco “drinks” themed colour series
- Smooth steel nib with consistent ink flow
- High capacity piston filling system
Feel in the hand
The Rootbeer Eco feels familiar in the hand, with a warmer visual tone than standard clear demonstrators. The amber resin softens the technical look of the pen and makes it feel more relaxed on the desk, especially when filled with brown or red inks.
Who it’s for
- Eco users interested in the “drinks” colour series
- Writers who prefer warm, brown or amber tones
- Users who like demonstrators with a softer visual presence
- People moving up from cartridge or converter pens
- Everyday writers who prefer high ink capacity with character
Not for
- Users who prefer opaque or fully solid coloured pens
- Those wanting compact or pocket sized designs
- People who prefer metal or heavyweight pens
- Writers who want minimal visual variation
Practical tips
- Brown and sepia inks pair naturally with the amber body, while creme coloured papers continue the vintage theme
FAQs
Is Rootbeer a limited edition? Yes, it is a limited production, which means once it sells out we usually can't get any more stock.
How is it different to the standard Eco? It uses the standard Eco stainless steel nib with bronze coloured trim.
How is it different to Eco Espresso? Espresso is a darker, more opaque brown. Rootbeer is a transparent amber-brown with more visible ink movement inside the barrel.
How does it fill? Submerge the nib in the fountain pen ink and turn the piston to draw up the ink. Cartridges free.
Can I use shimmer or document inks? Yes, as this pen has good flow, but clean the pen more often.
Can I disassemble it? Yes, all parts detachable for cleaning. Take care not to over tighten parts when reassembling or replacing the cap.
Can I replace the nib? Yes, replacement nibs (friction fit) are available.
Is it beginner friendly? Yes, it is a step up from cartridge/converter pens, but very popular with beginners. Instructions are included in the box.
Is it travel friendly? Yes, the large ink capacity is the appeal for travel. To travel by air, carry the pen completely full or empty, and store it with the tip up.
What’s included
- TWSBI Eco Rootbeer fountain pen
- WrenchÂ
- Silicon grease
- Simple gift box
- Instruction leaflet
-
Free nib tuning from LarryPOST
Ink pairing suggestions
- Brown inks for a consistent amber tone
- Sepia inks for a more vintage writing look
- Dark blue inks for contrast inside the barrel
- Black inks for a more formal writing setup
Build your practice
- The Eco "drinks" range works well as a small themed set
- Replacement Eco nibs are useful for exploring line widthÂ
- Midori MD notebooks pairs well with most brown inks
Specifications
- Brand: TWSBI
- Brand series: Eco
- Launch: April 2026
- Origin: Taiwan
- Nib: Stainless steel
- Nib sizes: EF, F, M, B, 1.1mm stub
- Filling system: Piston filler (1.8mL)
- Body: Transparent polycarbonate
- Trim: Bronze coloured steel
- Cap: Twist
- Diametre: approx. 13mm
- Length: approx. 139mm (capped)
- Weight: approx. 21g (capped)
- Comparable size: Lamy Safari, Pilot Metropolitan
Reliable Eco performance, with a warmer visual tone.
