Get Cradle to Cradle Certified™

Design Challenge VI Winners

These category winners and finalists are recognized for their innovative product designs, for their use of materials that may be perpetually cycled, and consideration of the product cycle as a pathway to growing the circular economy.

Best Use of Cradle to Cradle Certified Materials: House 4 House by Agnieszka Filipowicz, Ania Pieranska & Otis Sloan Brittain

by Agnieszka Filipowicz, Ania Pieranska & Otis Sloan Brittain, AUGA Studio, Copenhagen

Selected for its vision and thoughtful design focused on engaging the next generation to learn circular design in buildings by doing, House 4 House’s mission is to educate children about sustainability through house building kits, which in turn help to build a real house for every toy house sold. Inspired by different ways of building from across the world, House 4 House challenges typical pitched roof doll’s house design and allows children to explore their creative potential. Made with Cradle to Cradle Certified materials, including Accoya® Wood, Alcoa Aluminum, Nispen Corrugated Packaging and Porotherm Bricks, each kit includes building supplies, characters, furniture and guides for constructing a miniature house. When it’s time for a change, the starch-based mortar is simply washed off and the materials can be used again.  

Explore the House 4 House approach in activating creative potential for the future of circular buidling.

Best Overall Project: VOLTA by Koraldo Kajanaku

by Koraldo Kajanaku, Interaction Designer, San Francisco

Selected for the innovative use of safe, healthy materials and design-for-disassembly approach in addressing the highly hazardous, global problem of disposable batteries, Volta employs non-toxic materials (including Cradle to Cradle Certified Ingeo Biopolymer) in a battery that can be recharged in a bath of table salt and vinegar – or remanufactured, composted and recycled. Volta’s fastener-free, pill-form design make it easy to change parts, remove components from battery casing, and disassemble for reuse and recovery.

Get your product design inspiration supercharged by Volta.

Best Use of Aluminum: TO Stool by Robert Shudra

by Robert Shudra, Industrial Design Student, Carleton University, Ottawa, Canada

Selected for its elegant design and the clever use of perforated aluminum, which is shipped flat then folded into the final stool by the user (considerably reducing packaging and manufacturing energy and costs), TO Stool blends form with purposeful function. The stool aims to adjust throwaway habits by encouraging and facilitate the diversion of used textiles into circular life cycle streams. TO features a removable bag under the seat to create a dedicated area within the home for storing textiles intended for donation or recycling. Once full, the bag can be easily transported to donation facilities.  At the end of the stool’s useful life, the aluminum frame can easily be disassembled and infinitely recycled, while the renewable wood base can be repurposed or composted along with the accompanying textile bag.

Open up TO Stool's innovative design and use of aluminum.

Best Use of Autodesk Fusion 360: Bench32 by Ralf Schneider

by Ralf Schneider, Assistant Professor, Industrial & Interaction Design, Syracuse University, New York

Chosen for its brilliant use of Fusion 360’s simulation capabilities to both ideate and render the design, Bench32 is inspired by the imperative weight reduction in airplane construction. The repetition of 32 wooden spars forms the seating surface, which is held together by 80 metal parts. Reusing parts multiple times and aligning the elements with ample negative space creates a lightweight appearance that results in an extremely sturdy yet lightweight bench comprised of FSC-certified wood or Cradle to Cradle Certified™ Accoya® wood.

Sit down with Bench32's beautiful design using Autodesk Fusion 360.


  • Holde by Sara Parrish, Amber Baden-Lopes, and Sophie Collé

  • Dosalu by Kristen Tapping, Karen Silva, and Seval Ozakins

  • Cora by Ben Banks

  • BinBin by Danielle Connelly, Sarah Templin, Gregory Beson, and Weiran Chen

  • Bloom by Lauren D'Souza and Luka Thurlbeck

View the winning designs from Design Challenges I - V here!