Products

The TWSBI Eco fountain pen has earned its reputation as one of the best values in the fountain pen world—combining thoughtful engineering, impressive ink capacity, and everyday reliability in a clean, modern design.

Featuring TWSBI’s signature piston-filling mechanism, the Eco allows you to fill directly from a bottle of ink, offering a generous ink reservoir that keeps you writing longer. The transparent demonstrator barrel lets you easily monitor ink levels while showcasing your favorite colors. Its lightweight construction and balanced feel make it comfortable for extended writing sessions, whether you’re journaling, note-taking, or sketching.

Fitted with a smooth stainless steel nib in a range of sizes, the Eco delivers consistent ink flow and dependable performance right out of the box.

The TWSBI Eco fountain pen has earned its reputation as one of the best values in the fountain pen world—combining thoughtful engineering, impressive ink capacity, and everyday reliability in a clean, modern design.

Featuring TWSBI’s signature piston-filling mechanism, the Eco allows you to fill directly from a bottle of ink, offering a generous ink reservoir that keeps you writing longer. The transparent demonstrator barrel lets you easily monitor ink levels while showcasing your favorite colors. Its lightweight construction and balanced feel make it comfortable for extended writing sessions, whether you’re journaling, note-taking, or sketching.

Fitted with a smooth stainless steel nib in a range of sizes, the Eco delivers consistent ink flow and dependable performance right out of the box.

ECO-T has a slightly more pronounced grip section; to help with learning correct writing posture for kids, new enthusiast, and anyone who likes a little bit more structure to the grip area. Cap and end cap also has a rotary triangular shape design. 

Replacement Nib Units for TWSBI Fountain Pen

• TWSBI 580

• TWSBI Mini

• TWSBI Vac Mini

Bigger 70ml bottle. Will come with a funnel for easy filling, so you can get every last drop. Black, Sapphire blue, Red, Blue Black colors.

The TWSBI Kai fountain pen is a striking Limited Edition release that blends refined color with elegant detailing. Featuring a rich blue pebbled body paired with rose gold trim and nib, the Kai offers a distinctive look that feels both modern and sophisticated.

Built with TWSBI’s trusted piston-filling system, the Kai allows you to fill directly from bottled ink while providing generous ink capacity for extended writing sessions. Its balanced design and comfortable grip make it ideal for everyday writing, journaling, or adding a touch of style to your desk.

The pen is fitted with a rose gold–plated stainless steel nib available in multiple sizes, delivering smooth, consistent ink flow and a reliable writing experience.

The TWSBI Obsidian fountain pen is a striking Limited Edition release that pairs bold styling with the reliable performance TWSBI is known for. Finished in deep black tones reminiscent of polished volcanic glass, the Obsidian offers a sleek, modern look that stands out while maintaining an elegant simplicity.

Designed with TWSBI’s trusted piston-filling system, the pen allows you to fill directly from bottled ink while providing generous ink capacity for extended writing sessions. The balanced construction and comfortable grip make it well suited for everyday writing, journaling, or collecting.

Fitted with a smooth stainless steel nib available in a variety of sizes, the Obsidian delivers consistent ink flow and a dependable writing experience.

While the pen cap will physically fit onto the back of the pen body in a way that would be considered ‘posting’, TWSBI recommends NOT doing so to avoid potentially scratching the barrel.

The Obsidian color features a new coloring technique in the injection molding process to create unique patterns and colors. Every single pen will be unique.