The pipette dropper has always been a sustainability nightmare. Skincare brands love them—they signal precision, luxury, a promise that every drop counts—but the typical dropper blends glass, rubber, and plastic in a configuration that makes recycling a fantasy. You'd need to disassemble the thing, which almost no one does.
In June 2025, Shellworks, a London-based materials startup, released what it claims is the world's first fully home-compostable dropper. Every component, from bulb to tube, is made from Vivomer, the company's microbially fermented polymer. Toss it in your backyard compost bin, the company says, and it will break down in under a year. No sorting. No mixed-material guilt.
That dropper may be a small thing. But it represents the kind of unglamorous, detail-oriented problem-solving that separates the current wave of biomaterials ventures from earlier generations of compostable plastics—materials that promised much in the lab but crumbled under the harsh scrutiny of commercial scale and real-world use.
On March 4, Shellworks announced a $15 million Series A round led by alter equity, with backing from NFDG (Nat Friedman), JamJar, and existing investors including Founder Collective, LocalGlobe, and Third Sphere. The funding follows a $6.2 million seed raised in May 2022. The company plans to use the capital to build blow-molding infrastructure and establish a regional production network across the UK, EU, and US wellness markets.
More notable than the check size, though, is the timing. Shellworks says it has achieved something that has bedeviled the bioplastics industry for years: cost parity with traditional premium packaging materials—glass and aluminum, specifically—at around five million units. If that claim holds, it could pull Vivomer out of the sustainability-forward niche and into the mainstream consumer goods conversation. Perhaps more than the founders anticipated when they started, regulatory tailwinds in Europe and California are now pushing brands toward compostable formats at precisely the moment Shellworks says it can deliver them at scale.
A Regulatory Window, Opening Fast
Vivomer is a polyhydroxyalkanoate, or PHA—a family of polymers produced by microbes fermenting plant or waste biomass, including used cooking oil. Shellworks positions it as "plastic-free" in the sense that it sidesteps petroleum feedstocks, and the company says the material is free of BPA and PFAS. Certified by TÜV Austria for home composting (OK compost HOME), Vivomer begins decomposing in about twelve weeks and completes breakdown within roughly 52 weeks in a home compost pile, according to testing cited by brand partners in mid-2025 product launches.
That home-compostability distinction matters more now than it did even two years ago.
The European Union's Packaging and Packaging Waste Regulation, which entered into force on February 11, 2025, will require certain packaging types—tea and coffee pods, sticky labels on produce—to be industrially compostable by February 12, 2028. The regulation also asks the European Commission to develop harmonized home-compost standards by February 12, 2026—standards still in development—signaling that home compostability could become a differentiator in markets where curbside organics collection remains patchy. And it does remain patchy: in much of Europe and North America, municipal composting programs exist, but coverage is inconsistent, and acceptance of compostable packaging is facility-specific at best.
California, meanwhile, has layered on its own set of mandates. SB 54, the Plastic Pollution Prevention and Packaging Producer Responsibility Act, sets a goal for 100% of single-use packaging and plastic foodware to be recyclable or compostable by 2032, with formal rulemaking initiated in August 2025. AB 1201, governing compostable and home-compostable labeling, has an enforcement deadline now extended to June 30, 2027. SB 343 tightened "recyclable" claims in December 2025 to require in-state collection and processing infrastructure for items to be labeled recyclable—no more aspirational labels with no matching system.
The UK's extended producer responsibility scheme for packaging, meanwhile, went live in 2025 with base fees; recyclability-modulated fees that reward easily recyclable or compostable formats and penalize ambiguous or non-recyclable packaging will kick in starting in the 2026/27 scheme year.
Policy is converging. Whether infrastructure can keep up is another question.
From Boutique Beauty to Tesco
Shellworks has shipped more than 1.8 million Vivomer units and replaced over 90 tonnes of conventional plastic across the UK, US, and EU as of September 2025, according to company statements reported in trade publications. The material has moved beyond boutique beauty brands into mass retail—a leap that few bioplastics startups manage.
Wild, the personal-care brand in Unilever's portfolio, sells compostable Vivomer body-wash refills at Tesco—one of the UK's largest grocery chains—paired with a reusable outer case. Wildsmith Skin launched products in 100% compostable Vivomer jars between March and June of last year. The dropper, introduced in June 2025, earned the company recognition at the Dieline Awards 2025 in March.
CEO and co-founder Insiya Jafferjee has an unusual résumé for a materials startup founder. A Stanford-trained product designer, she spent five years in Apple's manufacturing design group before completing a master's at the Royal College of Art and Imperial College London. In a January LinkedIn post, she wrote about prioritizing practical deployments over laboratory claims—a subtle jab at the gap between lab biodegradation and real-world performance that has plagued earlier generations of compostable plastics.
It's a fair critique. The bioplastics industry has cycled through waves of hype and disappointment. Materials that degrade beautifully under controlled lab conditions often struggle in the messier environments of municipal composting facilities or, worse, backyard compost piles where temperatures fluctuate and microbial communities vary. The result has been consumer skepticism and brand hesitance.
Shellworks' claim to cost parity at five million units is designed to address the other side of that equation: even if a material works, brands won't adopt it at scale if it costs significantly more than incumbent solutions.
The Manufacturing Calculus
Shellworks says Vivomer can be processed using conventional injection and blow-molding lines, reducing the capital barrier for converters. That compatibility matters. If a packaging manufacturer has to retrofit or replace equipment to handle a new material, the economics shift quickly. With the Series A funding, Shellworks is building its own blow-molding capabilities and establishing a regional production network to serve North American and European markets.
That manufacturing strategy contrasts with some competitors. Notpla, another UK-based startup and 2022 Earthshot Prize winner, has scaled seaweed-based coatings on molded fiber for quick-service restaurant and stadium foodservice trays, with deployments in the Netherlands reported as recently as January and February. Finland's Sulapac offers wood-composite biobased polymers for cosmetics that are industrially compostable and certified by BPI, Seedling, and TÜV; the company announced partnerships with packaging supplier Texen in 2024 and a thermoforming foil collaboration in 2025.
In the PHA space specifically, CJ Biomaterials is expanding its PHACT portfolio and signaled ambitions in early March to lead the global PHA market within three years. Singapore-based RWDC Industries has partnered with Lummus Technology on process scale-up for its PHA made from used cooking oil and other waste feedstocks. Japan's Kaneka outlined plans several years ago to scale its PHBH production above 100,000 tonnes by 2030.
But the sector has seen stumbles. The bankruptcy filing of Danimer Scientific—a US-based PHA producer—in March 2025 underscores the cost and scale-up challenges that still confront the industry. High energy prices in Europe relative to pre-2020 baselines compress converter margins, even as capital continues flowing to PLA and PHA projects motivated by corporate carbon reduction targets, according to analyst notes from Mordor Intelligence published in January.
Global bioplastics production capacity is forecast to roughly double from 2.31 million tonnes in 2025 to 4.69 million tonnes by 2030, according to European Bioplastics' December 2025 market data report. Yet bioplastics still account for less than one percent of the roughly 414 million tonnes of plastics produced annually worldwide.
It's a rounding error. A very expensive, heavily scrutinized rounding error.
The Science Is Messier Than the Marketing
The policy push comes as scientific scrutiny of compostables intensifies. A December 2024 field study published in Science of the Total Environment tracked PHBV (a PHA variant) sheets in marine and estuarine environments, documenting biodegradation rates that varied by site. Benthic locations showed faster breakdown than surface environments, with lag times between nine and 110 days before mass loss began. The research confirms that PHAs do biodegrade in natural environments, but the timeline is environment-dependent—meaning the beautiful simplicity of "compostable" as a consumer promise gets complicated quickly.
A 2024 review in Environmental Sciences Europe highlighted fragmentation risks: compostable plastics can still break into small debris if conditions for complete biodegradation are not met, potentially creating what the authors term "biodegradable microplastics." The European Environment Agency has repeatedly cautioned that compostables must not undermine recycling systems—they are counted as impurities in conventional plastics recycling streams and require clear labeling and routing to organics collection.
Ellen MacArthur Foundation guidance, widely referenced in circular economy frameworks, acknowledges a role for compostable packaging in specific applications—formats in direct food contact that are contaminated with organics—but emphasizes that these remain single-use solutions. Infrastructure and consumer education remain critical bottlenecks. You can make the perfect compostable material, in other words, but if consumers throw it in the blue bin or the grey bin or just toss it in a park, the material's end-of-life benefits never materialize.
Shellworks' TÜV Austria home-compost certification and BPA/PFAS-free claims position Vivomer for the policy environment taking shape. The European Commission's request for harmonized home-compost standards by February 2026 is expected to provide clearer benchmarks across the EU27+3, though those standards are not yet finalized.
Beauty as Testing Ground
The beauty and personal-care sector is emerging as an early testing ground for compostable refill formats. It's a category where contamination of recyclables is high—think lipstick-smeared tubes and serum bottles with product residue—and mechanical recycling economics are poor for small, mixed-material components. Wild's Tesco program and Shellworks' all-Vivomer pipette droppers exemplify what industry observers call "last-mile" solutions: addressing the small parts that consumers rarely sort correctly and that recycling systems struggle to handle.
If Shellworks' reported cost parity holds at scale, expect broader adoption in high-margin wellness and beauty categories, followed by selective expansion into adjacent consumer packaged goods niches that can absorb compostable routing requirements or support home-compost claims under tightening labeling laws. The company's emphasis on drop-in manufacturing compatibility could accelerate converter adoption, especially in Europe where carbon border adjustments on fossil polymer imports and producer responsibility fees are tilting incentives toward certified alternatives.
But. There's always a but.
The bioplastics industry's capacity is set to double by 2030, yet it will still represent a fraction of global plastics production. What separates the next generation of materials companies from their predecessors may not be the chemistry alone, but the ability to navigate a fragmented regulatory landscape, prove real-world performance, and reach cost structures that make sustainability a default rather than a premium choice.
Shellworks has capital, shelf presence at a major retailer, and regulatory tailwinds. Whether it can scale Vivomer into a materials platform that moves beyond beauty into broader consumer goods will depend on production execution and the pace at which composting infrastructure—both industrial and home-based—catches up to the materials themselves.
That gap between material innovation and waste infrastructure has tripped up plenty of companies before. Shellworks is betting it can close it, or at least narrow it enough to matter. The next eighteen months will tell whether that bet was premature—or perfectly timed.
