{"product_id":"twsbi-eco-clear-piston-fountain-pen","title":"TWSBI ECO Clear Piston Fountain Pen","description":"\u003ch2\u003eTWSBI ECO Clear Demonstrator Fountain Pen\u003c\/h2\u003e\n\u003cp\u003eEngineered for dedicated writers, calligraphers, and everyday fountain pen enthusiasts, the TWSBI ECO combines modern industrial transparency with exceptional ink mechanics. Built with a crystal-clear resin body, this demonstrator fountain pen lets you observe your favorite inks in motion while offering reliable balance in hand. Paired with a precision-machined aluminum grip section for enhanced tactile control, the pen delivers steady comfort across long journaling sessions, executive signing, and artistic sketching.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCrystal-Clear Resin Body:\u003c\/strong\u003e Transparent demonstrator barrel allows real-time visibility of ink color, shading properties, and remaining ink volume.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eErgonomic Aluminum Grip:\u003c\/strong\u003e Lightweight yet durable aluminum grip section delivers balanced weight distribution and slip-free fingertip control.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrated Piston Filling System:\u003c\/strong\u003e Smooth built-in piston mechanism draws ink directly from bottles without converters or proprietary cartridges.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Capacity Ink Reservoir:\u003c\/strong\u003e Substantial ink chamber holds ample ink to power through days of note-taking, journaling, and creative writing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision-Crafted Nib:\u003c\/strong\u003e Finely tuned nib provides immediate ink flow, smooth feedback, and consistent line definition across diverse paper types.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eComplete Maintenance Kit:\u003c\/strong\u003e Includes a dedicated disassembly wrench and silicone grease for effortless long-term cleaning and piston care.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e TWSBI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e ECO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilling Mechanism:\u003c\/strong\u003e Integrated Piston Filler (Bottled ink only)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e High-grade transparent acrylic resin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrip Section:\u003c\/strong\u003e Machined aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrim \u0026amp; Clip:\u003c\/strong\u003e Chrome-plated metal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePostable:\u003c\/strong\u003e Yes (secure cap posting ring)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded Accessories:\u003c\/strong\u003e Mini wrench, silicone grease vial, protective presentation box\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I fill the TWSBI ECO fountain pen with ink?\u003c\/strong\u003e\u003cbr\u003e\nA: Submerge the nib and feed fully into your chosen bottled ink, then twist the piston turning knob at the back end counterclockwise and back clockwise to draw ink smoothly into the internal reservoir. Wipe excess ink from the section and nib with a clean cloth.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Does this pen require disposable ink cartridges or a separate converter?\u003c\/strong\u003e\u003cbr\u003e\nA: No. The TWSBI ECO features a fully integrated piston filling mechanism, eliminating the need for single-use plastic cartridges or small converters and maximizing ink capacity.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How should I maintain and clean the pen when changing ink colors?\u003c\/strong\u003e\u003cbr\u003e\nA: Flush the reservoir with clean lukewarm water by cycling the piston back and forth until the water runs clear. For thorough servicing, use the included wrench to service the piston mechanism and reapply silicone grease as needed.\u003c\/p\u003e","brand":"TWSBI","offers":[{"title":"EF","offer_id":68976815439906,"sku":"TWSBI-FP-ECO-1","price":66.0,"currency_code":"USD","in_stock":true},{"title":"F","offer_id":68976815472674,"sku":"TWSBI-FP-ECO-2","price":66.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0902\/3045\/6354\/files\/1792466565751--1991877657.jpg?v=1792467370","url":"https:\/\/www.xypen.com\/products\/twsbi-eco-clear-piston-fountain-pen","provider":"XYPen","version":"1.0","type":"link"}