Shellworks raises $15M to reinvent packaging without plastic
London-based startup Shellworks has secured a fresh $15 million funding round to scale its microbe-made, plastic-free packaging, betting that brands are ready to move beyond traditional fossil-based materials. The investment underscores growing confidence that biomaterials can replace conventional plastic packaging at industrial scale.
Microbe-made materials targeting fossil plastics
Shellworks engineers packaging by harnessing microbes to produce natural polymers that behave like plastic in use, but are designed to be compostable and free from petrochemicals. Instead of relying on oil-derived resins, the company cultivates microorganisms that convert feedstocks into biopolyesters, which can then be processed into films, coatings and rigid containers.
The startup positions its technology as a direct alternative to single-use plastics used in food, cosmetics and e‑commerce packaging. By tuning the underlying biopolymers, Shellworks aims to match key performance traits such as barrier protection, transparency and durability, while enabling end-of-life options like industrial composting or organic recycling.
Riding regulatory and consumer pressure
The $15M bet comes as regulators tighten rules on single-use plastics across the UK, Europe and the US. New extended producer responsibility schemes and bans on hard-to-recycle materials are forcing brands to rethink packaging portfolios. At the same time, consumers are increasingly rejecting products wrapped in non-recyclable plastic, pushing retailers to seek credible alternatives.
Investors view Shellworks as part of a broader wave of climate tech startups focused on decarbonising materials. By using microbe-driven processes that can run on renewable or waste-derived feedstocks, the company argues it can cut the carbon footprint of packaging while simplifying disposal.
Scaling from pilot lines to mass production
The new capital will be used to expand manufacturing capacity, deepen partnerships with global brands and accelerate R&D into next-generation formulations. Shellworks is expected to focus on high-volume formats such as flexible films, sachets and coated paper, where plastic reduction targets are most aggressive.
As retailers and consumer goods giants race to meet 2030 sustainability pledges, microbe-made packaging is emerging as a serious contender. With this $15M round, Shellworks is positioning itself to be a key supplier in a future where packaging performs like plastic, but no longer is plastic.