TWSBI ECO Fountain Pen – Cosmos Blue Onyx
A stunning fusion of engineering and artistry, the TWSBI ECO Cosmos Blue Onyx is designed for writers who demand performance, beauty, and everyday reliability. Inspired by the mystique of deep space, this edition features a mesmerizing blue-onyx resin body with transparent elements that reveal the precision-crafted piston mechanism inside — a signature TWSBI hallmark.
Smooth, balanced, and built for serious writing, the ECO delivers an effortless ink flow and exceptional comfort, making it the perfect companion for journaling, note-taking, signatures, or gifting.
Why You’ll Love It
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Striking Cosmos Blue Onyx limited colour edition
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Reliable piston-filling mechanism — holds more ink than cartridge pens
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Crystal-clear barrel accents to showcase the ink reservoir
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Stainless steel nib (available in a range of sizes) for smooth, consistent writing
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Lightweight yet sturdy — perfect for daily carry
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Secure, snap-fit cap to prevent ink dry-out
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Designed for easy disassembly & cleaning
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Exceptional value from one of the world’s most trusted writing brands
Specifications
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Brand: TWSBI
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Model: ECO – Cosmos Blue Onyx
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Nib Material: Stainless Steel
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Filling System: Piston Filler
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Body Material: Resin with transparent components
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Cap Type: Screw-on
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Ink Capacity: High-capacity piston reservoir
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Packaging: Premium TWSBI gift box with wrench & silicone grease
Ideal For
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Students & professionals
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Fountain pen beginners upgrading to a serious writer
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Long writing sessions
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Everyday journaling
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Gifting to pen lovers
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Collectors of special-colour TWSBI editions
Buy your TWSBI Eco Cosmos Blue Onyx Fountain Pen from Makoba!
Title
Brand
Collection
Product Origin
Product Type
Nib Material
Nib Size
Trim
Colour
Cap & Barrel
Cap Mechanism How to remove the cap of the pen when its closed.
Ink Capacity - Converter
Ink Filling Mechanism
Diameter
Postable Can the cap be put on the back of the pen to make it longer.
Length When Closed
Length When Posted
Weight of Cap
Weight of Barrel
Total Weight The total weight of the pen including the cap and barrel. The pen is not filled with ink when measuring this.
Warranty
Packaging
Wondering what is our return / refund policy?
We do accept returns and refunds. Here are a few things to keep in mind:
- Product has to be in an unused condition with all its tags, warranty certificates and user manuals (if any) in tact.
- Return request is raised within 3 days of receipt of product.
- Consumables like inks, refills and paper products cannot be returned or exchanged.
- For more information on returns and (or) refunds, check out our return / refund policy.
When are orders shipped?
Every order creates an adrenaline rush in our team so any order received before 1PM will usually be shipped on the same day itself. However, due to unforeseen circumstances if we are not able to get your ready, rest assured we will ship it the next day. For more information on shipping, check out our shipping policy section.
Fretting for an online purchase?
We do not consider ourselves as a sales store, but more like your personal consultants.
- Our team is always ready to guide you through your journey at Makoba - whether that is online or in store.
- Thats right! We have 4 exclusive boutiques in the country that are just waiting for you.
- Visit the Our Store page, find your nearest store and connect with us immediately
Wondering the importance of pens in today's digital age?
Your great idea is just waiting to be put on paper. Put that piece of writing instrument into motion and see its magic.
- No digital form will give you as close a satisfaction that you get from writing.
- There's a reason why journaling, note-taking and writing down ideas is no more an outdated activity.