The science side

Why this bottle?

Manufacturing nearly all materials produces carbon emissions. To minimise our environmental impact, our primary goal was to use as little material as possible while still providing the uncompromising protection our extra-virgin olive oil requires. We asked ourselves, why rely on a single material to do everything? Instead, we chose a specialised dual approach: a cardboard outer shell provides rigidity and crucial protection from sunlight, while an inner pouch acts as an oxygen barrier, preserving the delicate flavours so your oil reaches you exactly as the harvest intended.

Our search for the ultimate low-impact packaging led us to the Frugal Bottle. We love the name because it reflects our approach: it is literally frugal in materials, using significantly less mass than traditional alternatives.

As the data shows, this dual-material design drastically reduces overall material compared to standard heavyweights like glass and aluminium. Furthermore, even when looking strictly at internal plastic usage, our 16.15 g barrier is on the lower end for standard plastic refill pouches, keeping our footprint small without compromising what's inside.

This dramatic reduction in physical weight translates directly into a significantly lower climate impact. We measure this footprint in CO₂ equivalents (CO₂e) because carbon emissions are the standard metric for climate change. This is a global crisis threatening fragile environmental systems everywhere, and while it certainly endangers olive groves like ours, it is a much larger issue that demands responsibility and action at every level of production.

The numbers make the choice obvious: our bottle generates up to six times less carbon than standard glass alternatives. By shedding the heavy, energy-intensive glass shell, we ensure that protecting the oil doesn't come at the expense of the planet.

True sustainability goes beyond the bottle itself; it requires rethinking the entire supply chain. Standard industry practice involves manufacturing heavy glass bottles in one country, shipping them empty across Europe to be filled, and then shipping them back. Instead, our logistics follow a simple, highly efficient rule: we ship oil, not glass.

Once the bulk oil arrives, we carefully bottle it by hand in the UK, merging logistical efficiency with artisanal quality control. Even in the most conservative scenario, where the glass bottle is manufactured right in Greece, this method still moves 38% less mass than the conventional model. In reality, since Greece imports most of its glass packaging, empty bottles must first travel hundreds of kilometres to reach the filling site, making the true gap far wider.

Refill systems are excellent in theory, but their true climate impact depends heavily on the reusable vessel's mass. By tracking cumulative carbon over an eight-year model, we can estimate how long it takes for a reusable container to offset its heavy initial manufacturing emissions.

While we actively encourage zero-waste practices, the data reveals a difficult truth about packaging longevity:

• Glass paired with plastic refill pouches is the strongest alternative to our design, but it takes nearly two and a half years (~29 months) of unbroken use for the reusable glass to finally outperform the Frugal Bottle.
• Ceramic bottles require just over twelve years of continuous refills to break even with our lightweight packaging because of their massive initial carbon debt.
• Aluminium bulk refills and reusable plastic never catch up. Buying 2.5 L aluminium tins generates more carbon over time than buying a new Frugal Bottle for every purchase, while plastic degrades and must be replaced too frequently.
• Single-use glass or ceramic is the worst possible outcome, creating an immediate, massive carbon spike if the bottle is not rigorously refilled.

While a lifelong glass bottle is ideal, most people cannot maintain years of flawless refill discipline. By drastically reducing weight from the start, our design pairs a highly renewable cardboard shell with a minimal, though inevitably plastic, inner pouch. It's the most practical low-carbon solution, delivering immediate emissions savings without relying on perfect consumer habits.

After the last pour.

Carbon footprint measures climate impact, but it doesn't capture the full environmental picture. We would love to claim that our packaging is effortlessly and entirely recycled, but the reality of global recycling is far more complicated.

The deeper a material travels through this pipeline, the harder it is to find reliable data, and even where data exists, it can't always be trusted. The UK government's 2024 DEFRA packaging statistics stop at reprocessed, without tracking whether that material ultimately becomes a useful secondary product. Worse, the same reported quantity of recycled glass yields a 65.7% recycling rate under Method 1, but 80.4% under Method 2; the gap comes purely from how each method estimates the overall packaging market.

So instead of leaning on flawed numerics, we focus on physical reality: how materials are actually collected, sorted, and reused within our existing waste infrastructure.

Evaluating a material's true end-of-life requires looking past theoretical capabilities and examining how it behaves in the actual waste stream.

The infrastructure for flexible plastics is shifting, though slower than we would like. In July 2026, the UK government delayed the mandate for local authorities to collect household plastic film from March 2027 to April 2030. This pushback highlights exactly why immediate, material-reducing climate action is necessary today. Rather than waiting for government timelines, we chose a minimal liner that aligns directly with these upcoming policies, ensuring the material is primed for recovery as local infrastructure improves.

We currently use a pure polyethene pouch because it guarantees a strong oxygen barrier and certified food safety while using the absolute minimum material. However, we are actively researching alternative materials to eventually replace it:

• Recycled polymer: Promising, but achieving reliable, thin food-safe barrier performance remains technically challenging.
• Bio-based polymer: Utilising a renewable feedstock does not automatically translate to better overall lifecycle or environmental performance.
• Aluminium-based barrier: Provides excellent protection, but introduces complex coatings and laminates that are incredibly difficult to separate, making its current end-of-life reality worse than our current plastic pouch.

Our immediate priority was selecting a liner that safely preserves the oil while minimising upfront carbon emissions. Moving forward, our research is strictly focused on finding a material innovation that maintains this extreme efficiency while delivering a genuinely superior end-of-life reality.

Can packaging change more than one bottle's footprint?

Climate and environmental transitions rely on shifting technologies, policies, and consumer expectations all influencing one another. Trigly's modest contribution to this shift is making the environmental decision visible through our packaging. While a slightly lighter glass bottle or a cleaner factory process is very important, it remains hidden; our paper olive-oil bottle becomes a direct conversation starter about the environment, increasing the everyday engagement we need to drive necessary change.

This structural rethink aligns with UK regulations, which explicitly require packaging to use only the minimum weight and volume needed to keep a product safe. Furthermore, the UK's incoming Extended Producer Responsibility (pEPR) scheme will financially penalise heavy packaging by shifting the full cost of end-of-life waste management directly onto producers. By aggressively stripping away excess mass today, our bottle puts us ahead of the curve on a necessary change the entire industry will soon be forced to make.

Conclusion