Compostable Liquid Sachets: A New Eco-Friendly Packaging Era

Roughly 855 billion sachets are used worldwide every year to pack ketchup, mustard, cooking sauces, hand cream and similar products. Made from three-layer laminates that combine polyolefins, aluminium foil and polyester, they are almost impossible to recycle and put enormous pressure on the environment. In 2026 a breakthrough arrived: a fully compostable liquid sachet packaging solution built on cellulose film reached the market — the first time small-volume liquid packaging has delivered a sustainable, compostable route for both industrial and household settings. Here is what the shift means for the flexible packaging industry.

The sachet's environmental paradox: the price of convenience

Single-serve sachets are ubiquitous because they are convenient — they open with one hand and are built for throwaway portability. That convenience carries a heavy environmental cost.

• Sheer scale: industry estimates put global sachet use at roughly 855 billion units in 2018 alone.
• Structure defeats recycling: most small sachets use a three-layer build containing incompatible materials — polyolefins, aluminium foil and polyester — that cannot realistically be separated within existing recycling systems.
• Small and soiled: the packs are tiny and frequently contaminated with food residue, which makes recovery even harder.
• Where they end up: these miniature composite plastic packs often escape into the environment and become a significant source of microplastic pollution.

The technology: cellulose-based film that fully biodegrades

In February 2026, compostable film manufacturer Futamura, flexible packaging converter Repaq and machine builder GK Sondermaschinenbau jointly announced a fully biodegradable and compostable liquid pouch solution based on NatureFlex™ technology. It can handle liquid products including ketchup, mustard, cooking sauces and hand cream.

The innovation sits in the material choice. The new compostable laminate pairs a barrier cellulose film from Futamura with a bio-based film layer that guarantees an airtight seal. The structure holds dual certification for industrial and home composting, so complete degradation is achievable whether the pack is sent to an industrial facility or dropped into a home compost bin.

Performance figures:

• Under standard conditions (23°C, 50% relative humidity), oxygen transmission rate is as low as 0.5;
• Shelf life of up to 12 months;
• Production efficiency is identical to conventional structures — repeatedly validated on small, medium and large GK Sondermaschinenbau machines;
• After two years of joint R&D, Repaq's technical manager confirms the new packaging delivers strong product protection alongside substantial ecological benefits.

Industry implications: a route for the hardest packaging to recycle

Liquid sachets have long been counted among the most difficult packaging types to recycle. The significance of this compostable solution is not only technical: it sets a new course for flexible packaging, moving away from relying on perfect recycling systems and toward designing for a material's end-of-life from the outset.

• The first commercial sachets using the compostable structure are about to launch;
• GK Sondermaschinenbau's Sales Director says the solution needed virtually no adjustment to existing equipment during testing;
• Futamura's Regional Sales Manager notes that a home-compostable liquid sachet genuinely answers market demand for comprehensive sustainable packaging in both food and non-food sectors;
• The wider bio-based materials market is expanding quickly: industry statistics put global growth at a compound annual growth rate (CAGR) of 22%, projected to reach $57.83 billion by 2026;
• Bio-based pouch materials are projected to grow from $735 million in 2025 to approximately $1.256 billion by 2035, a CAGR of 5.5%, driven mainly by food industry demand for sustainable packaging.

From three-layer laminates to compostable structures: practical takeaways

• Materials: a barrier cellulose film plus a bio-based sealing layer offers an alternative route for liquid sachets and small-format sauce packs;
• Equipment: testing indicates the switch requires almost no changes to existing lines, keeping conversion barriers low;
• Certification: dual industrial and home compostability is a strong credential when brands screen sustainable packaging;
• Positioning: compostable formats suit high-value, sustainability-led product lines and complement established spouted pouches, bag-in-box (BIB) and stand-up pouches with taps.

The arrival of fully compostable liquid sachets lets small-volume liquid packaging escape the single-use, non-recyclable, polluting cycle. From three-layer composite plastics to all-cellulose compostable structures, the path shows that even the most difficult pack formats can move toward an environmental closed loop through material innovation. For food, beverage and personal care brands that depend heavily on pouch packaging, now is the moment to assess compostable options. Guangdong Kody Packaging (Dongguan Kody Plastic Products Co.,Ltd. / Guangdong Kody Packaging Products Co.,Ltd.) supplies spouted pouches, bag-in-box (BIB), stand-up pouches with taps, colostrum bags, liquid packaging bags and laminated roll film for food, personal care and liquid packaging customers — contact us for a quote and samples.