I spend a lot of time in conversations where recyclable, compostable, and bio-based are treated as a cluster of sustainability words that roughly mean the same thing. They don't. Each one is a specific technical claim about a specific material property. Getting them confused leads to claims that can't be substantiated and, increasingly, regulatory exposure.

This is a short guide to what each term actually measures.

Recyclable: what happens at end of life

Recyclable describes the end-of-life pathway of a material. A material is recyclable if it can be collected, sorted, processed, and turned into a secondary raw material that replaces virgin input.

The practical complication: recyclability is infrastructure-dependent. A material can be technically recyclable but not recoverable in a given market if collection and sorting systems don't exist for it. Most cosmetic packaging falls into this gap. Contamination with formulation residue is a further barrier: a jar with traces of face cream cannot typically enter a clean polymer recycling stream without washing, which most municipal systems don't do.

Recyclable says nothing about what the material is made from or how it was produced. A petroleum-derived plastic can be fully recyclable. A bio-based material can be non-recyclable. These properties are independent.

Compostable: what happens under specific conditions

Compostable describes breakdown under specific conditions. Certified industrial compostable means the material breaks down completely within a defined timeframe (typically 12 weeks) in a controlled industrial composting facility at 55-60°C with managed moisture and microbial activity. This is certified under standards like EN 13432 or ASTM D6400.

Home compostable is a stricter claim: breakdown at lower temperatures (ambient, typically 20-30°C) and longer timescales. Fewer materials qualify. Certification is available but rarer.

The important nuance: industrially compostable materials do not break down meaningfully in landfill, in the ocean, or in most home compost setups. Labelling packaging as compostable without specifying the conditions is misleading unless most consumers have access to the required infrastructure.

A PLA (polylactic acid) cup is often cited as compostable. It is, in an industrial composting facility. In a landfill, it behaves similarly to conventional plastic. The word compostable on its own doesn't tell you this.

Bio-based: what the material is made from

Bio-based describes the origin of the carbon atoms in the material. A bio-based material derives its carbon from biological sources (plants, agricultural residues, algae) rather than fossil sources (petroleum, natural gas). The percentage is measured by radiocarbon analysis under ASTM D6866 or EN 16785.

Bio-based content tells you about feedstock, not fate. A 93% bio-based material doesn't automatically biodegrade. It doesn't automatically end up in a recycling stream. It simply means that most of the carbon in the product came from the atmosphere through biological uptake, not from underground fossil reserves. This is meaningful for lifecycle assessments and carbon accounting; it is not a statement about end-of-life.

Why the conflation happens

All three properties can coexist in a single material. Certified industrial compostable bioplastics like PHA are bio-based, biodegradable, and compostable under the right conditions. But the overlap is not automatic. Materials can have any combination:

  • Bio-based and non-biodegradable: bio-PE (sugarcane polyethylene) is chemically identical to petroleum PE once processed. It is recyclable alongside petroleum PE but does not biodegrade faster.
  • Petroleum-based and compostable: some synthetic co-polymers are certified compostable despite being fossil-derived.
  • Bio-based and not recyclable: many bio-composites and natural fiber materials fall here, including materials like ours.

The conflation happens because all three properties are associated with environmental benefit, and marketing has found it easier to use them interchangeably. Regulatory pressure is changing this, at least in markets with strong consumer protection frameworks.

What Agropak is and isn't

I want to be explicit about how we describe our own material, because this is exactly the kind of distinction that matters.

Agropak jars are bio-based (93% bio-based content, verified by TÜV SÜD under ASTM D6866). They are not described as biodegradable or compostable. Those properties would require separate testing and certification against specific breakdown standards, which we have not pursued. The barrier coating applied to the material has not been tested for compostability. We don't know how it behaves in composting conditions, so we don't claim it.

End-of-life for Agropak jars is an honest uncertainty for us right now. The material contains no fossil plastic. The disposal pathway in practice depends on local infrastructure and the barrier coating chemistry. We are not able to say it is compostable. We are not able to say it is recyclable in most streams. What we can say is that 93% of its carbon came from plants, not petroleum, which is a meaningful starting point for a lifecycle comparison with conventional plastic.

That distinction, clearly stated, is the only kind of claim we should all be making.