Kalipti
Kalipti (Greek for ‘to cover, encompass, conceal’) is a CO2-negative stool made of a CO2-storing material. Its three identical, self-supporting parts stabilize each other, allowing for a smaller, cost-efficient mould and easily replacable parts.
Funiture & Material
carbonauten GmbH
2020
Industrial Design
Biomass stores carbon by absorbing CO2 from the air until decomposition or combustion releases it.

Pyrolysis locks in CO2 by converting biomass into stable biochar, preventing its immediate release.

By combining biochar with polymers, a new material is created—carbonauten NET Materials®, which stores and avoids CO2.
Challenge
How might a stool be designed to not only reduce CO₂ through its material but also minimize its footprint and remain easily recyclable?

Self-stabilizing constructions, as found in nature, are optimal for this use case.
Ideation & Contruction
Dividing the structure into three interlocking components reduces manufacturing, packaging, and shipping costs, as smaller tools are needed, components stack compactly, and fit into smaller packages.

The interplay of material and construction enables the return to the material cycle. If any of the components from Kalipti is damaged, it can either be mechanically recycled by carbonauten. It is shredded and re-injection molded
Alternatively, if mechanical recycling is no longer possible, it is re-carbonized, meaning it is pyrolyzed again and thus chemically recycled. In this process, the material is broken down into its basic components through pyrolysis to produce new products.