Written by Ashley Moscrop, Managing Director, Dufaylite Developments Ltd
Reviewed by Sophie Bayes, Sales (Food Box market), Envirolite and Ultra Board
Last updated: 10 September 2026
Key takeaways
- Four materials compete in chilled food delivery packaging: paper honeycomb, sheep’s wool, expanded polystyrene (EPS) and multi-layer corrugated cardboard. Each behaves very differently on cost, packing speed and what the customer does with it.
- Independently certified by CarbonQuota (study DUF01_003, June 2025): Envirolite® Honeycomb Board produces 0.16–0.26 kg CO2e per delivery box, against 0.42 kg CO2e for sheep’s wool and 0.56 kg CO2e for EPS.
- Theoretical recyclability and real consumer behaviour are different things. A wool liner arrives inside a plastic bag and needs separating, then a trip to a supermarket collection point. A paper liner goes in the kerbside paper bin with the outer box.
- Simpler Recycling has standardised kerbside paper and card collection across England since 31 March 2026, which is what makes a paper liner’s recycling route real rather than theoretical.
- Rigid chilled food delivery packaging drops into automated packing cells. Sheep’s wool is floppy and suits hand-packing; multi-layer corrugated has to be folded and assembled, which costs time on every box.
Chilled food delivery packaging keeps food at a safe temperature in transit, and the liner inside the box does the work. Four materials compete for that job: paper honeycomb, sheep’s wool, EPS and multi-layer corrugated. Paper honeycomb is the only one that combines engineered thermal performance, a rigid form that suits automated packing, and a liner the customer can put straight in the kerbside paper bin.
If you run a recipe box, a chilled grocery service or a direct-to-consumer food brand, chilled food delivery packaging is one of the few decisions that touches everything at once. It decides whether the food arrives at the right temperature. It decides how fast a box can be packed. It sets a meaningful part of your Extended Producer Responsibility bill. And it is the component your customer physically handles, judges you on, and then has to get rid of.
Most comparisons of chilled food delivery packaging stop at thermal performance. This guide covers the three things that actually decide the outcome once the boxes are going out at volume: what happens to the liner at the customer’s end, what it costs you beyond the unit price, and whether it will run on a packing line.
The four materials competing for chilled food delivery packaging
There are four realistic options in chilled food delivery packaging, and it is worth being precise about each before comparing them.
Paper honeycomb. The rigid option in chilled food delivery packaging: a board with a hexagonal paper cell core between two paper facings. The insulation comes from air trapped in the cells, which is why it delivers thermal performance using very little material. It is engineered to the box rather than selected from a catalogue.
Sheep’s wool. Natural wool fibre, batted and sealed inside a plastic film bag to keep it clean and dry. The dominant premium option, most recognisably from WoolCool, and genuinely good at holding temperature.
EPS (expanded polystyrene). Moulded polystyrene liners or full cool boxes. The cheapest upfront and the most familiar to operations teams, which is exactly why it persists despite mounting pressure.
Multi-layer corrugated. Typically four or five layers of corrugated board built up into an insulating liner for chilled food delivery packaging. Paper-based and kerbside recyclable, which makes it superficially attractive.
One material that is not on this list, despite appearing in a lot of general packaging comparisons, is moulded pulp. It is a genuine competitor for moulded protective inserts, but it is not used as a thermal liner in chilled delivery boxes, and including it in a chilled food delivery packaging comparison muddies the decision.
Chilled food delivery packaging compared: the four materials side by side
Set out side by side, the four chilled food delivery packaging materials separate quickly — and they separate on the operational and commercial factors more sharply than on thermal performance.
| Factor | Paper honeycomb | Sheep’s wool | EPS | Multi-layer corrugated |
|---|---|---|---|---|
| Recycled kerbside in practice | Yes — straight in with the outer box | No — separate wool from the plastic bag, then take the bag to a store | No — not accepted kerbside | Yes — paper stream |
| Carbon per delivery box | 0.16–0.26 kg CO2e | 0.42 kg CO2e | 0.56 kg CO2e | No verified data published |
| EPR liability | Baseline (Green-rated paper) | Roughly double paper honeycomb (our analysis) | Higher, plus polystyrene complications | Comparable to honeycomb |
| Plastic Packaging Tax exposure | None | Yes — on the film bag | Polystyrene-based complications | None |
| Automation-ready | Yes — rigid, drops in | No — floppy, hand-pack | Yes — rigid | Slow — folded and assembled |
| Material used per box | Least — air does the insulating | Medium | Light but non-recyclable | Most — four or five layers |
| Bespoke sizing | Yes — any dimension, any geometry | Yes | Limited — needs a mould per format | Yes |
| Vegan-compatible | Yes | No — animal-derived | Yes | Yes |
Carbon figures certified by CarbonQuota, study DUF01_003, June 2025. EPR comparison is Dufaylite’s own analysis.
What actually happens to the liner in your customer’s kitchen
This is the part of the chilled food delivery packaging decision that gets skipped, and it is the one your customers experience directly. It is also where chilled food delivery packaging is judged by someone who never sees your spec sheet.
There is a large gap between what a material can do at end of life and what a household actually does with it. Both facts can be true at once: a material can be genuinely recyclable and still, in practice, go in the general waste bin almost every time.
Take a sheep’s wool liner. The wool is sealed inside a plastic film bag to keep it clean. To recycle it properly, your customer has to open the bag, separate the wool, then take the film to a supermarket soft-plastics collection point, because film is not accepted kerbside. The wool itself can be composted, put on a flower bed, or returned through a producer scheme.
Now picture that happening on a Tuesday evening with dinner to make. Separation takes time. A special trip to a shop takes more. Composting wool is unfamiliar to most households, and return schemes carry both a time cost and usually a credit implication. In practice, the overwhelming majority of customers do none of it, and the wool and the bag go into general waste together.
Paper honeycomb chilled food delivery packaging asks for none of that. It is paper. It goes into the kerbside paper and card collection alongside the corrugated outer box the food arrived in. No separation step. No trip to a shop. No return scheme. No plastic bag anywhere in the process.
This became more concrete on 31 March 2026, when Simpler Recycling came into force across England and standardised kerbside paper and card collection. The recycling route for a paper liner is now the same one every household already uses without thinking.
That is the honest conversion argument in chilled food delivery packaging, and it is a difficult one to counter — not because wool is a bad material, but because the comparison is between a route people actually follow and one they mostly do not.
The carbon numbers, independently verified
Carbon claims in chilled food delivery packaging deserve scepticism, so this section deals only in third-party verified figures.
CarbonQuota independently assessed the carbon footprint of Envirolite® Honeycomb Board used in food delivery boxes (study DUF01_003, June 2025), cradle to grave, against the alternatives. The results:
- Envirolite® Honeycomb Board: 0.16–0.26 kg CO2e per delivery box
- Sheep’s wool: 0.42 kg CO2e per delivery box
- EPS: 0.56 kg CO2e per delivery box
Expressed as comparisons, that is a 35–60% lower carbon footprint across its entire lifecycle compared to a sheep wool insulation alternative, and a 50–70% lower carbon footprint across its entire lifecycle compared to an expanded polystyrene insulation alternative — certified by CarbonQuota. The advantage holds across every scenario tested, including low-density EPS variants.
Put plainly for anyone building a carbon model for chilled food delivery packaging: a wool liner carries roughly double the footprint of a paper honeycomb liner, per box, every box. At 20,000 boxes a week that difference compounds into a number your reporting will notice.
The full assessment is published in the CarbonQuota case study, and the underlying data behind our chilled food delivery packaging claims is set out on our carbon footprint study page.
The cost you don’t see on the quote
Comparing chilled food delivery packaging on unit price alone will mislead you, because two significant costs of chilled food delivery packaging sit outside the quoted price.
Extended Producer Responsibility. Every producer pays EPR — there is no exempt material and no such thing as an EPR-free liner. What changes is the fee, because fees are modulated by recyclability under the Recyclability Assessment Methodology (RAM), which sorts packaging into Red, Amber and Green bands. Paper that enters standard kerbside streams rates Green and attracts lower modulated fees.
The gap between bands is widening. Red-rated packaging pays 1.2× the base fee in 2026/27, rising to 1.6× in 2027/28 and 2.0× in 2028/29. In Year 2 specifically, Red-rated packaging pays around 20% more than the Amber fee while Green-rated packaging pays about 9% less. The first invoices reflecting modulation land in the second half of 2026. The scheme is set out in the GOV.UK Extended Producer Responsibility guidance.
Our own analysis of the two liner formats puts sheep’s wool at roughly double the EPR liability of paper honeycomb per box. That is our figure, not a third-party assessment, but the direction follows logically from the banding.
Plastic Packaging Tax. The film bag around a wool liner is plastic packaging, and it is subject to Plastic Packaging Tax at £228.82 per tonne as of 1 April 2026. A paper honeycomb liner has no film component and so no exposure to the tax at all.
Freight. Weight travels, and chilled food delivery packaging travels on every single order. A lighter liner using less material per box means lower shipping weight across every consignment — a small per-box number that becomes a large annual one.
Packing line reality: rigid drop-in versus floppy and fold-flat
The point at which chilled food delivery packaging stops being a sustainability decision and becomes an operations decision is usually the moment a business outgrows hand-packing. It is the stage where chilled food delivery packaging has to suit a machine rather than a pair of hands.
A paper honeycomb liner is rigid, and it arrives as a single flat blank — a base the size of the box footprint with four sides attached by partial cuts. It stays flat until it is pressed into the box, and the box walls push those four sides up as it slides in.
That construction is the whole automation argument. A packing cell picks one flat blank and presses it home. There is no folding step, no assembly, and no placing of separate walls.
Sheep’s wool is floppy by nature. It conforms, which is useful thermally and unhelpful mechanically — most packing automation cannot reliably pick, orient and place it, so wool tends to keep producers in hand-pack. Any food box brand scaling past a certain volume runs into this, and it is one of the more common reasons a liner gets reviewed.
Multi-layer corrugated chilled food delivery packaging presents a different problem. It is rigid enough, but a four or five layer liner has to be folded and assembled into the box. At a few hundred boxes it is an irritation. At thousands per shift it is a genuine labour cost, repeated on every single box, and it is the reason a drop-in insert wins on throughput even when the material cost looks similar.
There is a materials point buried in the multi-layer comparison worth drawing out. Achieving equivalent thermal performance from layered corrugated takes considerably more paper — more layers, more weight, a bulkier liner eating usable volume inside the box. Honeycomb gets its insulation from air trapped in the cells, so it delivers the same thermal job with dramatically less paper. Paper is the best end-of-life outcome of the four materials, but the principle is still to use the least material that does the job.
How a bespoke liner is specified
Every Envirolite® chilled food delivery packaging liner is engineered rather than picked from a range, and there is no standard-format constraint to design around. Our manufacturing equipment adjusts size, cell structure, facing type and liner geometry freely, so the liner fits your box rather than your box accommodating the liner.
The variables that get set during specification:
- Cell size — 8mm, 15mm, 27mm or 47mm, which influences insulation behaviour and rigidity.
- Thickness — anywhere from 6mm to 100mm, set against the temperature you need to hold and for how long.
- Facings — recycled paper or kraft, depending on the application.
- Geometry — a single flat blank: a base the size of your box footprint with four sides attached by partial cuts, cut to your dimensions and any product cavities.
Two specification details matter particularly in chilled food delivery packaging. The adhesive is water based, VOC free and PFAS free. And Dufaylite holds the BRCGS AA Global Food Safety Standard — we are the only paper honeycomb provider in the world to hold it, which is a supplier-level distinction within the honeycomb category rather than a claim about materials generally. Many food packaging suppliers across all four liner materials hold BRCGS certification of some form; what is unusual is holding AA within paper honeycomb. You can verify the standard itself at BRCGS.
If you want the engineering detail behind how the cell structure holds temperature, we cover it in more depth in our guide to thermal boxes for chilled goods delivery. For the commercial range, see our food packaging solutions, and for how bespoke specification works in practice, our bespoke packaging process. When you are ready to test one, talk to our food box team and we will engineer a liner to your box and send you a sample.
Frequently asked questions
What is the best chilled food delivery packaging for a recipe box brand?
For most recipe box and chilled grocery operations, paper honeycomb is the strongest all-round choice of chilled food delivery packaging. It holds temperature to an engineered specification, drops into automated packing cells because it is rigid, carries the lowest verified carbon footprint of the four materials at 0.16–0.26 kg CO2e per box, and goes into the customer’s kerbside paper collection with no separation step. Wool competes on thermal performance but not on packing automation, carbon or end-of-life simplicity.
How long does a paper honeycomb liner keep food chilled?
There is no single answer, because thermal performance in chilled food delivery packaging is engineered to the requirement rather than fixed. Cell size, panel thickness and liner geometry are all set against the temperature you need to hold, the ambient conditions and the delivery window — typically 24 to 48 hours for a last-mile chilled service. We test liners against the specific transit profile rather than quoting a generic hold time, because box size, product mass and coolant all change the result.
Can the liner go in the kerbside recycling?
Yes. Paper honeycomb chilled food delivery packaging is paper, and it goes into the household paper and card collection alongside the corrugated outer box. There is no plastic film to separate, no supermarket drop-off and no producer return scheme involved. Since Simpler Recycling came into force across England on 31 March 2026, kerbside paper and card collection is standardised, so the route is the same one your customer already uses.
Is paper honeycomb food-safe?
Yes. For chilled food delivery packaging, Dufaylite holds the BRCGS AA Global Food Safety Standard and is the only paper honeycomb provider in the world to do so. The adhesive used is water based, VOC free and PFAS free. BRCGS is determined by a manufacturer’s processes rather than by the material, so suppliers across all four liner materials may hold certification — the distinction is that within paper honeycomb, Dufaylite is uniquely certified to AA.
Will it work on an automated packing line?
Yes, and this is one of the clearest practical advantages of rigid chilled food delivery packaging. A paper honeycomb liner is rigid, holds its shape and drops into an automated packing cell as a single insert. Sheep’s wool is floppy and generally restricts producers to hand-packing. Multi-layer corrugated must be folded and assembled on every box, which adds labour time that compounds at volume.
Can you make a liner to fit our existing box?
Yes. There are no size limitations on bespoke paper honeycomb chilled food delivery packaging — our equipment adjusts size, cell structure, facing type and geometry freely, so any box dimension, thermal requirement or insert shape can be engineered. Most brands come to us with an existing outer box and a temperature target, and we design the liner around both rather than asking them to change the box.
Where to start
If you are reviewing your chilled food delivery packaging, the most useful first step is not a quote — it is a sample engineered to your actual box and tested against your actual transit profile. That tells you what a switch in chilled food delivery packaging would mean for temperature performance, packing speed and carbon, using your numbers rather than generic ones.
Send us your box dimensions, your temperature requirement and your weekly volume, and our food box team will engineer a liner and get a sample to you.
