TWSBI ECO Fountain Pen - Cosmos Blue with Onyx Ink Gift Set as well as the sun

as well as the sun and moon

One moment it’s greenish-blue

Made with high-quality materials

Limited to 200 pieces

TWSBI ECO Fountain Pen - Cosmos Blue with Onyx Ink Gift Set as well as the sunLaunch your writing to a whole new galaxy with TWSBI ECO Fountain Pen Cosmos Blue with Onyx Cosmos Blue with Onyx of the ECO fountain pen collection is a limited edition made with mixed color acrylic introduced in November 2025. The making of Cosmos Blue involves mixing green, dark blue and light blue acrylic for the cap and piston knob and pairing with an onyx colored nib and trim. The colors of the acrylic are mixed during the injection molding