TWSBI Eco Bahama Yellow Fountain pen

Discover the perfect blend of affordability, function, and style with the TWSBI Eco Bahama Yellow Fountain Pen. Designed for both beginner and seasoned fountain pen enthusiasts, the Eco (short for economical) series is one of the most budget-friendly piston-filling pens on the market—now available in a refreshing bahama yellow color.

Bold Design with Practical Performance

The faceted bahama yellow cap and piston knob add a modern and vibrant touch to the pen’s aesthetic, while the transparent resin barrel offers a full view of the ink level and internal piston mechanism. This clear design not only highlights your ink color of choice but also provides a visually satisfying, dynamic writing experience.

• Bahama Yellow accents for a unique, fresh look
• Transparent barrel reveals ink and piston system
• Faceted cap adds structure and a bold profile
• TWSBI logo elegantly finishes the top of the cap

Smooth Writing, Multiple Nib Options

Equipped with a polished stainless steel nib, engraved with the TWSBI logo, the Eco delivers a smooth, consistent writing experience. Available in a range of nib sizes—from extra-fine to broad—it caters to handwriting styles of all kinds, whether you're journaling, sketching, or writing professionally.

Easy Maintenance & Built-In Value

One of the standout features of the TWSBI Eco is its ability to be fully disassembled for cleaning and servicing. Each pen comes with instructions and tools for disassembly, making it a favorite for those who enjoy maintaining their writing instruments. (Note: Disassembly is recommended for experienced users and is not required for standard use. Proceed at your own risk.)


With a history of more than 40 years of manufacturing, including producing high-end pens for other brands, Ta Shin Precision decided to start selling under their own brand, TWSBI. The name TWSBI is made up from TWS and BI. ‘TWS’ is the reversed initials of the phrase ‘San Wen Tong’, translated Hall of Three Cultures, and ‘BI’ literally means writing instrument.