Most sustainability copy is written by marketing and sent to a supplier to be signed off. The claim comes first and the evidence second, which is why so many recycled content packaging claims unravel when a retailer or a marketplace asks for the file. The order should be reversed: the certificate exists first, and the sentence is written around it.
This guide is for brand owners and packaging buyers who want environmental wording on cartons, labels, listings and decks without borrowing risk. It covers what each claim type requires, how three frameworks ask different questions, and which documents to request before artwork goes to print.
Key takeaways
- A green claim is a factual statement you must be able to prove, not a tone of voice.
- Recycled content needs a basis: percentage of what, by weight, at which stage, backed by a declaration or certificate.
- An FSC certificate covers named products and sites. It does not make a ceramic mug sustainable.
- FTC, UK CMA and EU approaches ask different questions, so one sentence can pass one review and fail another.
- Tie each claim to the artwork version it supported, and re-check the evidence before every reprint.
1. Why the claim fails after the box is printed
At a glance: claims are challenged months after print, when the person who wrote them has moved on and the evidence file no longer matches the packaging.
A claim on a carton has a long life. It reaches a retailer’s compliance desk, a marketplace listing review, a buyer questionnaire and sometimes a complaint. Each asks the same question differently: show us the basis. If the answer is a verbal assurance, the cheapest option is usually to withdraw the claim and reprint.
Environmental attributes on a mug sit in different places. The ceramic body comes from clay, glaze and kiln processes; the carton, tray and sleeve come from paper; the print comes from ink and a firing cycle. A claim about packaging does not describe the mug, and a claim about the factory does not describe the carton. Glaze and kiln choices set much of the body’s profile, which we treat separately in our guide to sustainable ceramic production.
2. Start with the evidence, then write the sentence
At a glance: the workable order is attribute, scope, evidence, wording, then one file that ties all four together.
Choose the attribute before the adjective. Recycled is an attribute; eco-friendly is a mood. Then fix the scope: is the percentage about the shipping carton, the printed sleeve, the whole pack or the order? A number without a boundary is the most common defect in a packaging claim.
| Claim | Evidence required | Safe wording pattern |
|---|---|---|
| Recycled content | Declaration or certificate naming material, percentage and stage | Name the percentage, material and source in one sentence |
| Recyclable pack | Component material list, plus local collection reality | Paper-based carton and tray accepted in kerbside collection where sold |
| FSC-certified board | Certificate for the product group and chain of custody, plus label rules | Carton uses FSC-certified board under the licence shown on the pack |
| Plastic-free pack | Packaging bill of materials, including tape and labels | No plastic in carton, tray or sleeve, with any exception listed beside it |
| Compostable pack | Third-party certification for that component and those conditions | Named component is certified to a stated standard, or the claim is not made |
Note what is missing: adjectives. Every row can be written as a sentence with a subject, a scope and a source. If you cannot write it, you have an aspiration rather than a claim. Our sustainability page lists the documents we publish.
3. Recycled content: what the percentage measures
At a glance: a recycled content figure only means something with a material, a unit, a stage and a source attached to it.
Recycled content is usually a percentage by weight of a material in a component. Pre-consumer waste from a converting plant and post-consumer waste collected after use are different inputs, and buyers increasingly ask which one a figure refers to. The packaging bill of materials answers it: board, tray, sleeve, label, tape and ink, each with its own figure.
Recycled content is not recyclability, and neither is compostability. Board with a high recycled fibre share can be hard to recycle if laminated or heavily coated; a light uncoated carton can be easy to recycle with no recycled content at all.
Two boundaries catch teams out. A ceramic body is not made from recycled paper, so a packaging figure must not travel to the product. And ink, coating or lamination affect recyclability even when the board is certified. Products with a material or care advantage sit in our sustainable mugs range.
4. FSC: what the certificate covers
At a glance: an FSC certificate covers a defined scope — products, sites and a chain of custody — and the claim must not travel beyond it.
FSC certification applies to forest-based material and the organisations handling it. A certificate names the products and sites in scope and comes with label rules, including a licence code and approved wording. When a buyer asks whether your packaging is FSC-certified, the accurate answer concerns the board and the chain of custody, not the mug.
Certificates expire, scopes change and suppliers switch mills. A claim true for last year’s carton can be wrong for this year’s reprint, which is why the evidence is re-checked at artwork approval rather than filed once. Our FSC certificate is available to download and can be shared with a buyer’s compliance team.

5. Three frameworks, three questions
At a glance: the FTC Green Guides, the UK CMA Green Claims Code and EU rules approach green claims from different angles, so wording that works in one market is not automatically safe in another.
The FTC’s Green Guides set out how the agency views environmental marketing claims, including the risk of unqualified general claims and the need for clear, prominent qualifications. The UK CMA’s Green Claims Code sets principles for claims to be truthful, clear, complete and substantiated. EU work on substantiating claims has been developing, with enforcement differing between markets, so treat the position as current rather than settled.
| Framework | Core question | Practical move |
|---|---|---|
| US — FTC Green Guides | Is the claim truthful, with qualifications clear and prominent? | Keep the basis in the same sentence or an adjacent line |
| UK — CMA Green Claims Code | Is it truthful, clear, complete, substantiated and fair? | Review the whole pack, not the headline |
| EU — developing framework | Can the claim be substantiated under the rules in that market? | Confirm the current position with your compliance team |
Two consequences follow. One sentence may need different qualifications in different markets, and a claim cleared for one channel can fail in another because the context differs. Localise the claim, not the translation. More on glaze and kiln decisions sits in our Sustainability column.
This article is general information, not legal advice. Confirm the applicable standard with your compliance team or lab.
6. Wording patterns that survive a review
At a glance: specific, qualified, sourced statements survive; adjectives do not.
- Name the component. Carton, tray or sleeve when only one part qualifies.
- Name the measure. Percentage by weight, and the material it applies to.
- Keep the qualification visible. Same line, similar size, no buried asterisk.
- Avoid general benefit claims. Eco-friendly or sustainable without a basis invites the hardest questions.
- Compare only with a stated basis. Less board than a previous carton needs both figures and a date.
- Date the evidence. Certificates expire, so re-confirm at each reprint.
One more rule is administrative. Keep the certificate, the supplier declaration and the exact artwork version in one folder per SKU, and ask for the file with your quote. Six months later the answer is a file name, not an email search.
7. The documents to request before artwork
At a glance: ask for the evidence at the same time as the price, not after the packaging is printed.
A supplier can only support a claim it can document. The request is simple: which certificate or declaration covers this material, which site and product group it names, when it expires, and whether it can be shared with your customer’s compliance team. Ask before the dieline is signed off, because changing a board specification after print is expensive.
| Document | What it supports | How to get it |
|---|---|---|
| FSC certificate | Chain of custody for forest-based board in printed cartons and trays | FSC page or your quote |
| Environmental management system certificate | The environmental management system at the producing organisation | Certificate page |
| Higg FEM self-assessment | Facility-level environmental performance data for retail onboarding | Request with your quote |
| Sustainable development plan | The Liling operation’s published commitments and actions | Plan download |
| FDA and LFGB test reports | Food-contact safety of glaze and decoration, which is not an environmental claim | Request for the destination market |
Four of those documents support environmental statements and one supports a food-contact statement. Keeping them distinct prevents the commonest mistake in a claims file: using a safety report as evidence for a sustainability sentence.
8. How MugFactory de-risks the claims file
MugFactory is a vertical full-stack custom mug company producing ceramic, bone china and stoneware mugs on exclusive Liling lines, with design, packaging, QA, export documents and after-sales handled by one in-house team. For a sustainability claim, the useful part is that the specification, the packaging and the documents sit with the team that also signs the artwork.
- Specification first: body, glaze, board grade and print method are written into the quote, so claim and product describe the same thing.
- Audit and management documents on file: FSC, environmental management system, Higg FEM, BSCI, Sedex and ISO 22000, shared on request.
- Claim wording checked against the artwork, including qualification and placement, before the dieline is released.
- No percentage without a source: a recycled-content figure is stated only where a declaration or certificate supports it.
- Batch traceability and a photo QC report, so a statement about a production run can be traced to that run.
Ask for the documents behind the claims
Send the market, the packaging specification and the sentence you want to use. We will tell you which documents cover it and which wording we can support.
FAQ
Can we call our mugs eco-friendly?
Treat it as a general benefit claim that needs a stated basis. Eco-friendly on its own says nothing a buyer or reviewer can verify, and unqualified general claims attract the most scrutiny. Name the specific attribute instead — recycled fibre in the carton, FSC-certified board — and keep the proof with the artwork.
What evidence is needed for a recycled-content claim?
A supplier declaration or certificate naming the material, the percentage, whether the input is pre-consumer or post-consumer, and the component it applies to. It should come from the mill or converter, not from a sales email. Keep the declared figure and the exact wording in one file, and re-check both at each reprint.
Is an FSC certificate enough on its own?
No. A certificate covers a defined scope — named products, sites and a chain of custody — and the claim has to stay inside it, including label rules and licence code. If the board supplier or the printer changes, the evidence is re-confirmed before the next print run.
What are the EU rules on green claims?
EU work on substantiating environmental claims has been developing, and requirements and enforcement differ between markets. We do not predict how that will settle. Confirm the current position with your compliance team, and localise the claim and its qualification for each market rather than translating one sentence.
What documentation can you provide?
FSC certification, an environmental management system certificate, a Higg FEM self-assessment, BSCI and Sedex audit documents, ISO 22000 documentation and the Liling sustainable development plan. Food-contact test reports are separate and cover safety, not sustainability. Availability depends on your market and program, so ask with your quote.