Your cart

Your cart is empty

Circular Ballpoint Pen Black - Handmade Bioplastic
Handmade in Germany

Handmade 3D Printing in Germany Manufactured using an innovative 3D printing process
Bioplastics Petroleum-free, fully recyclable Made from renewable resources from Europe
Made in Germany Made in Germany Regional production without long transport routes
4,93 · 6 shop reviews
26,00 €
incl. VAT & shipping in DE
American Express Apple Pay Bancontact BLIK EPS Google Pay iDEAL Wero Klarna Maestro Mastercard MobilePay PayPal Shop Pay Union Pay Visa
In stock · Delivery in 3–5 business days
Made in EU
Premium service
Shipped by the maker
That's what's behind it.

Bioplastics meet minimalist form

Writing with Responsibility – The Minimalist Circular Ballpoint Pen

The "Kreislauf" (Circular) ballpoint pen in black combines sustainable writing with a minimalist design. Handcrafted in Germany from petroleum-free bioplastic that is fully recyclable and comes to you in eco-friendly packaging.

Material & Craftsmanship

The pen is made from 3D-printed bioplastic (black) and a metal refill – a combination that blends high stability with a pleasant tactile feel. The matte, grippy surface remains robust and comfortable, even with frequent use between workstations. The consistent ink flow and clear, minimalist form make it a timeless writing instrument for everyday use.

Who is it for?

The "Kreislauf" pen is for you if conscious consumption is important to you – whether you love taking notes, prefer minimalist design, or simply want to feel good about your everyday writing. Students, creatives, and office workers will find a pen that suits their workflow and not only functions but also encourages reflection.

youro selected the "Kreislauf" because it demonstrates that sustainability doesn't require a compromise on function – and true design doesn't need gimmicks.

Technical details

Material & dimensions.

14.5 cm
length
~8 mm
diameter
100%
Recyclable
Black
Color
Petroleum-free bioplastics

Made from renewable European raw materials – not from petroleum and 100% recyclable

3D Printing Innovation

Manufactured using modern 3D printing – where craftsmanship meets technology

Robust tactile feedback

Matte, non-slip surface with even ink flow – lasts long even with daily use

Material Specifications
Material: Bioplastic (petroleum-free) · Refill: Metal
Legal notices
Manufacturer
Prototo
Daniel Kurtius
Blücherstraße 11
22767 Hamburg
Deutschland
Contact the brand
Trust & quality

What our customers say.

4,93
Youro shop rating
From 6 verified buyer reviews · since August 2025
Shopauskunft Verified reviews
SA
Shopauskunft Verified buyer reviews

„Hat immer alles gepasst. Tolle Qualität der Produkte und freundlicher Kundenservice."

„Schönes Konzept, endlich findet man lokale Alternativen! Die Bestellung hat gut funktioniert. Hatte eine Rückfrage, Kundensupport hat direkt reagiert. Klare Empfehlung!"

„Das Messer liegt perfekt in der Hand und schneidet fantastisch. Die Verarbeitung ist auf einem ganz anderen Niveau als das, was man sonst so kennt."

Daniel Kurtius
Daniel Kurtius
Herkunft & Handwerk

Von der Idee zum Handwerk.

Seit 2024 entwickelt prototo nachhaltige Designprodukte im Hamburger Studio - 'pro toto' (für das Ganze): jedes Produkt kostenfrei zurücknehmen, Materialien im eigenen Betrieb recyceln.

Europäische Wertschöpfung
  • Deutschland Design, Herstellung │ Kugelschreiberminen │ Stahlfedern
  • Schweiz Recyclingpapier (außerhalb EU)
  • Niederlande Bioplastik
  • Österreich Bioplastik

„Prototo ist ein Design Studio mit dem Ziel maximal nachhaltige Produkte zu entwickeln. Recyclingfähig, klimaneutral, in Handarbeit und mit Bioplastik, mit den kürzesten Lieferketten und aus europäischem Material."

— Daniel von Prototo
Inspiration

Design that lasts.

Non-binding product visualization

Frequently asked questions

The love is in the details.

Prototo

More from this brand.

Curated brands

80+ brands, one standard.

Discover products from Europe