McDonough x frog and Haddy

Furniture for a
Regenerative Future

A Cradle to Cradle DesignTM collaboration by McDonough x frog, in partnership with Haddy

Shaping a regenerative future

Cradle to Cradle® reimagines design through nature’s lens, where waste becomes a resource, energy is endlessly renewable, and diversity drives resilience. Developed by architect William McDonough and chemist Michael Braungart, it challenges us to create in ways that give back more than they take. At frog, we share this vision: creation must be regenerative by design, and human by experience. This means using healthy materials that can safely return to nature or re-enter the manufacturing cycle. It also means engineering for durability, anticipating end-of-use and next-use, designing for disassembly and enabling closed-loop systems through reuse, repair, recycling or composting.

In collaboration with William McDonough and 3D-printed furniture pioneer, Haddy, frog developed Twist, a joyful, extensible furniture system designed for personalization and change. Centered around an iconic, oversized helical column, Twist transforms into seating, tables, storage or dividers. Designed to move with people through life, Twist grows, shifts and invites continual reinvention. By embodying Cradle to Cradle DesignTM principles, Twist shows how design can enable products to be continually renewed rather than discarded. It sets a new standard for furniture, and offers a hopeful, human-centered vision for how design can shape a regenerative future.

Twist's playful mechanism facilitates height customization and easy assembly and reassembly, encouraging personalization, next use and circularity.
Twist accommodates both linear and nonlinear configurations, offering spatial flexibility that evolves with changing needs.
The Twist column integrates seamlessly with a variety of accessories, extending functionality and enabling continual personalization.
Design that encourages people to cherish, repair and reimagine extends a product’s life and supports a regenerative future

Inna Lobel, Head of Industrial Design, frog

  • Blueprint for circular living

    Project highlights

  • Challenge

    Make regeneration tangible

    Bring Cradle to Cradle Design principles to life through a furniture collection that is not only regenerative, but also iconic and joyful.

  • Solution

    Joyful, modular and circular

    We developed Twist, an extensible system made from non-toxic biomaterials. Designed for disassembly, each piece is supported by a digital product passport and take-back program that enable repair, reuse and material reintegration, extending life at every stage of use.

  • Outcome

    Furniture that evolves

    Twist proves that circular design can be both joyful and regenerative. Its iconic form encourages continued use, while its materials and take-back program (guided by Cradle to Cradle Design principles) set a new standard for regenerative products.

Designed to grow over time, Twist evolves gracefully as needs and environments change.
Nature doesn’t have resources… Nature has sources. It is the job of humans to turn sources into resources for optimal use and reuse.

William McDonough

Giving form to circular living

Making circularity personal

Twist features an iconic, oversized helical column that serves as both a visual anchor and a structural core. Infinitely extendable and paired with a wide array of accessories, it enables a variety of functions and spatial configurations. With Twist, we bring together the worlds of architecture and industrial design, borrowing the timeless, classical columns of grandeur but bringing them down to human scale in a way that’s modular and expressive.

The collection encourages users to experiment and play with their space, composing unique structures for seating, storage and display. With Twist, people can transform their environment in ways that feel fresh and inspiring. As people’s needs evolve, Twist adapts with them, offering the flexibility to be used in new ways rather than being replaced. Its open-ended system is playful, personal and empowering, encouraging people to shape with creativity.

Cradle to Cradle Design

Ensuring Twist epitomizes the Cradle to Cradle Design framework

Twist brings William McDonough’s Cradle to Cradle Design framework to life by uniting emotional durability, material health and circular design. Starting with people, we created a furniture system that is adaptable and extensible by nature—encouraging reconfiguration, repurposing and play. This open-ended flexibility prolongs usefulness and reduces the likelihood of waste, fostering a regenerative loop where design invites ongoing interaction rather than disposal.

Crafted from a singular, non-toxic mono-material, Twist uses a polymer selected for its alignment with Cradle to Cradle material health principles—prioritizing environmental and human safety. Twist is produced through robotic 3D printing guided by AI, using an additive process that minimizes material waste and energy use. Manufactured locally and on demand, each piece avoids the environmental impacts of mass production and long-distance shipping.

Designed for easy disassembly, each component can be separated and reprocessed into new products, ensuring materials stay in circulation and retain value beyond the first owner. Every item is labeled with an RFID tag, linking to a digital product passport with details on materials, repair and return pathways. Our take-back program ensures components are either composted or reintegrated into new designs—reinforcing the principles of regeneration and closing the loop.

A QR code takes people to the digital passport.
The digital product passport empowers people to repair, reuse, recycle or compost furniture.
Twist is 3D printed using a material assessed for Cradle to Cradle compliance.

A regenerative future

The Twist collection proves that Cradle to Cradle Design principles don't limit creativity—they elevates it, transforming regenerative design into a source of beauty, joy and lasting impact.


Born from the collaboration between frog, William McDonough and Haddy, Twist is an iconic furniture system that not only minimizes environmental impact, but actively contributes to a regenerative future. It’s a blueprint for a future where creativity and regeneration go hand in hand.

This project exemplifies frog’s commitment to sustainability, proving that regenerative design can be both beautiful and practical.

With a range of expressive colors, Twist empowers people to celebrate and express their individuality.

Cradle to Cradle® is a registered trademark of MBDC, LLC.

Cookies settings were saved successfully!