In stock
Brand: TWSBI


The TWSBI Eco (short for economical) White is the least expensive fountain pens that uses the piston filling mechanism. The resin TWSBI Eco fountain pen has clear barrel that shows the mechanism very well. The clear body gives the TWSBI also a different look witht he ink it is filled with. The faceted cap gives the TWSBI Eco a powerful appearence. The TWSBI logo finish the top of the cap.

The TWSBI Eco Fountain pen has a polished stainless steel nib engraved with the TWSBI logo, available in several sizes.

TWSBI fountain pens can be entirely disassembled for the purposes of cleaning and servicing. Instructions and necessary tools are supplied with each TWSBI fountain pen. Please note that the disassembly feature is only there for experienced users and is not necessary for normal use. Disassembly is 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.

Additional information

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Closing System


Length closed

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12 reviews for TWSBI Eco Clear Fountain pen

  1. English

    António Monteiro (verified owner)

    My first Twsbi. Bought with a medium nib.
    From the first time it writes very softly and adequately wet.
    I slightly sanded the nib for a more calligraphic line at my taste and it is very pleasant to write with. It is the clear version, so it takes the ink color (the colored versions also allow to see the ink color).
    Being fully disassemblable allows for a complete cleaning whenever needed (supplied with a tool and grease).
    Not expensive for the overall quality and beauty.

  2. English

    Alex (verified owner)

    Excellent pen for sketching and note-taking. Size big enough for large hands. Ergonomic hold, comfortable for long sessions. Large ink capacity. Good steel nib, pleasant out of the box. Demonstrator, so easy to check how much ink is left. Value is high. Overall, an excellent pen for sketching in the field and as EDC.

  3. English


    Although not the most beautiful pen in the world, it is definitely a great bargain for this good quality. Good nib, smooth, and a huge amount of ink capacity. A great every day use pen!

  4. English


    Write really well and smoothly. The fine nib is a little broader than expected. Got some weight on it, which I like.

  5. English


    After seeing the twsbi all over the internet when I first fell into the fountain pen rabbit hole about a year ago, I knew I had hopelessly fallen in love with the demonstrator look. Immediately upon arrival I knew this pen would bring me joy for a lot of writing sessions to come; from the beautiful packaging to the feeling of the pen in my hand, it is gorgeous. As the words stream effortlessly from my hand, the slightly cool body of the pen rests against the fingers. The ink sloshes in the barrel, an infinitely fascinating sight. As the light reflects against the shape of the pen, I am lost in its beauty, simplicity, yet it is so intricate. I could write pages and pages about the joy my TWSBI eco clear brings me, but everything has been said already. All that is left now is to experience this pen yourself. (Wouldn’t it be wonderful if one would be able to submit handwritten reviews…?)

  6. English

    Emilio Francisco

    I was on the lookout for an affordable pen with a large ink capacity that I can use for my daily note taking. I then stumbled upon the TWSBI Eco, which I immediately bought upon seeing how highly recommended this was by the FP community. And I love it! The M nib writes smooth out of the box, and I only need to refill the ink once every two weeks! I highly recommend this pen for those looking for a reliable, bang for the buck, entry level fountain pen.

  7. English

    Andrea Maranta

    This pen is a must have for everyone who wants an everyday high quality piece : I have it in EF and it writes without any indecision even if left apart for days. Smooth and clean with a modern but alltimer style.

  8. English

    Akkakarn Sangthongchai

    Twsbi Eco is one of my favourite to go pen.
    It’a design is very nice and very egonomic for me.
    Twist the cap off and it’s ready to write anytime anywhere.
    Great pen to have. Highly recommended.

  9. English


    De Twsbi Eco is mijn eerste Twisbi. Ik ben meteen helemaal verkocht. De Fine schrijft erg soepel. Het piston mechanisme is super simpel. Ik heb nog nooit eerder een pen gevuld en het lukte in 1 keer zonder te vlekken.

    De punt is er heel gemakkelijk uit te halen door gewoonweg zachtjes te knijpen en trekken (NIET DOEN TERWIJL ER INKT IN JE PEN ZIT!)

    Het is erg leuk om de kleur van je inkt te zien in de doorzichtige pen.

    Kortom, een geweldige pen. echt zijn geld waard.

  10. English

    Ryan Masterson

    My TWSBI Eco is a really great Fountain Pen. It holds a large quantity of ink, and is super easy to clean. (With the Piston removal tool). I feel happy to use inks like J.Herbin Emerald of Chivor in my pen, as I can see all the residue in it. The nib is easy to remove, and change around. A really great, fun Fountain pen!

  11. English

    Robin De Vries (verified owner)

    Deze pen schrijft erg fijn! Het feit dat je de inkt kan zien is intrigerend en op momenten dat ik even na moet denken zit ik vaak met deze pen te spelen en kijk ik hoe de inkt beweegt. De pen ligt fijn in de hand en schrijft erg soepel. De achterkant van de pen draait niet makkelijk perongeluk, dus je hoeft niet bang te zijn dat je opeens met een knoeiboel komt te zitten.

  12. English

    Lise (verified owner)

    Dit is mijn eerste vulpen sinds jaren, ik denk wel terug naar mijn kindertijd. Mijn handschrift wordt steeds lelijker, dus het leek me goed om weer wat vloeiender te schrijven met een vulpen. Deze TWSBI Eco vind ik er mooi en modern uitzien en hij is ook niet duur. Ik heb hem zojuist ontvangen en ik vind het een geweldige pen. Hij schrijft zo soepel, de pen glijdt echt over het papier. Het vullen ging ook heel makkelijk, en hij ziet er gewoon super uit. Ik heb nog alleen maar "test" geschreven, maar ik ben heel enthousiast.

    Ik heb me nog niet verdiept in het onderhoud en het gereedschapje, maar dat zal wel niet zo’n vaart lopen.

    Mijn bestelling kwam overigens heel mooi en netjes verpakt met een aardig kaartje erbij. Heel attent.

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