Three recent redesigns: paper liners, fibre runners, mono-PE

Good redesigns usually change one thing that matters and prove it with a test. This week’s examples come from three different corners of packaging: UK cold chain shipping, air cargo load building and a household cleaning bottle. Each is a manufacturer’s announcement, so the performance figures are claims unless a third party is named.

For each pack below you’ll find what changed, why it works, where the trade-offs sit and what a designer can borrow. A table near the end puts the three side by side.

Hydropac EcoCool: one paper liner replaces insulation and cushioning

What changed. Hydropac, a UK temperature-controlled packaging specialist, has launched EcoCool, a paper-fibre box liner that combines thermal insulation and cushioning. Packaging Insights reports that it is meant to replace materials such as polystyrene, loose paper fill, cotton, jute and wool. It fits 10, 12 and 14 inch cubed box systems (roughly 254, 305 and 356 mm), according to Packaging Gateway.

Packaging Europe reports that the liner is made from clean, unused cardboard cut-offs. Production is dry, with no added glue or water, and runs on renewable electricity.

Why it works. Cold chain boxes often carry two or three separate materials: something to insulate, something to stop the product moving, sometimes a bag to hold it all together. A single fibre structure removes that mix at the point of disposal, which is where kerbside recycling usually fails. Hydropac says EcoCool has a green rating under the UK Recyclability Assessment Methodology (RAM), the tool used to judge recyclability under UK EPR. The company also says independent laboratory work on technical recyclability in a conventional recycling mill gave high screening yields, classed as “Best in Class”.

The thermal evidence is a single example from Hydropac’s own laboratory. A large box lined with EcoCool, with product and coolant inside, sat for 48 hours in a chamber cycling between roughly 20°C and 25°C, and the product surface stayed below 8°C throughout.

Trade-offs. The test covers one configuration, run by the seller. Hydropac’s managing director Colin Rowland makes the same point himself: “Sustainable insulation is only sustainable if it works.” The company’s advice is to test liner, coolant and product together, and it has committed to help customers do that before they switch.

The reports give no weight, wall thickness or price for EcoCool, so a comparison with the foam or fill it replaces on freight cost or pack volume isn’t possible from public information. The liner is also offered in three cube sizes, so a box outside those sizes means a different conversation.

Lesson. Treat the box as a system. A liner swap changes how much coolant you need, how the product sits and how the whole pack is rated for recycling, so the validation has to include all three. A green RAM rating is a UK EPR tool and says nothing about other markets, so check the scheme that applies where you ship.

Eltete TPM AirCargoRunner: lightweighting the load, not the product pack

What changed. Eltete TPM, a Finnish manufacturer, won the Air Cargo Environment Award 2026 for AirCargoRunner. Sustainable Packaging News describes it as a lightweight, fibre-based runner designed to replace conventional wooden support beams in suitable air cargo loading configurations. Eltete says it weighs approximately 1 kg per metre and can be over 80% lighter than conventional wooden materials in comparable applications.

The runner raises cargo above the locking system of the PMC aircraft pallet. In a suitable configuration, Eltete says this lets eight Euro pallets be loaded on a PMC instead of five, about 35% more loading area. The runner is in use with Finnair Cargo.

Why it works. In air freight, weight and usable volume are the costs that matter. A runner that is both lighter than the wood it replaces and lifts the load clear of obstructions improves two things at once, and neither depends on the consumer doing anything.

Eltete estimates that six runners on one PMC can reduce operational weight by approximately 100 kg. It also publishes fuel and CO₂ estimates for a typical long-haul flight from Helsinki. Those are scenario-based, and the company states they aren’t guaranteed savings. Read the assumptions before reusing any of the figures in your own reporting.

Trade-offs. The claims apply “in suitable configurations” and “in suitable applications”, and both phrases matter. The 35% extra loading area depends on how the cargo is built, and the 80% weight figure compares against wooden materials in comparable uses, not against every alternative. The sources don’t say how many trips a runner survives or what happens to it at end of life beyond the manufacturer describing it as recyclable, so those are questions for a supplier conversation.

Lesson. Transport and support packaging is often the heaviest part of a shipment’s non-product mass, and it rarely gets the design attention that the retail pack does. For designers working on grouped or e-commerce packs, the same logic applies: measure what the packaging adds to the load, then check whether a different structure also changes how much product fits in the space.

Dr. Beckmann carpet stain removers: a mono-material applicator

What changed. Dr. Beckmann has redesigned its 650 ml Carpet Stain Remover and Pet Stain & Odour Remover for the UK market. KamCity reports a more ergonomic bottle and a 2-in-1 brush head with 60% more bristles than before, using dual-bristle technology. The company claims up to 20% better stain removal.

The sustainability change is in the materials. Sustainable Packaging News reports that the sponge and the bristles are now polyethylene, the same material as the bottle, so the two can be ground down and recycled together.

Why it works. Applicators are a classic recycling problem: a bottle in one polymer with a brush or sponge in another, sometimes with metal or mixed fibres. Moving every part to polyethylene removes the need for the consumer or the sorter to separate them. The company says developing the finer bristles took more than two years of work with suppliers, which shows that the hard part of mono-material design is often performance in the small component.

Pairing the change with a visible performance upgrade also helps. A better brush is a reason to buy; the recyclability comes with it.

Trade-offs. The reports describe the brush head as “fully recyclable” on the brand’s own statement. They give no recyclability grade, no pack weights, and no figure for how much plastic the 60% increase in bristles adds. The 20% stain removal improvement is a company claim with a footnote in its release, and we haven’t seen the test method.

The retail price is given as £4.50 for each 650 ml product, but no earlier price is reported, so any cost effect is unknown.

Lesson. Mono-material design covers accessories as well as the main container. If your pack has a pump, brush, sponge or scoop, check its polymer against the body first, because that is where a recyclable bottle often becomes a mixed item. Budget development time for the component, not only the container.

The three side by side

Pack	What changed	Reported benefit	Gap to check
Hydropac EcoCool (UK)	Paper-fibre liner replaces separate insulation and cushioning materials	Green UK RAM rating; product below 8°C for 48 hours in the company’s lab test	No weight, price or third-party thermal data reported
Eltete AirCargoRunner (Finland; used with Finnair Cargo)	Fibre runner replaces wooden support beams on air cargo pallets	About 1 kg per metre; over 80% lighter than wood in comparable uses; about 35% more loading area in a suitable configuration	Fuel and CO₂ figures are scenario-based; reuse and end-of-life details not given
Dr. Beckmann stain removers (UK)	Brush sponge and bristles moved to polyethylene, matching the bottle	Brush and bottle can be recycled together; up to 20% better stain removal claimed	No recyclability grade or pack weights reported

What these examples have in common

Each change had to carry a function as well as an environmental benefit. At Pack Expo, Conagra’s vice president of sustainability Christine Daugherty put it this way, as reported by Food Business News: “Sustainability is added to this list, never traded against it.” The list she means is protection, shelf life, running on equipment and standing out on shelf.

Food Business News also reports that Conagra aimed for 100% renewable packaging materials by volume by 2025 and reached 93% in fiscal 2024, which Daugherty attributed largely to definitions and regulations changing during the programme. Design targets can move under you, so record which definition each claim relied on.

Two leads we left out

Two other leads this week are packaging design stories, but their sources report no sustainability change. Packaging of the World describes an Osaka confectioner’s jar for caramel almond brittle, designed for moisture protection with a tamper-evident seal and matching label and lid textures to simplify manual packing and reduce cost. General Mills says Cheerios with Ziploc PantrySeal puts the first resealable bag inside a traditional cereal box, aimed at freshness and easier pouring. Neither announcement gives material, weight or recyclability data, so we can’t say whether they improve sustainability.

What to do now

List every secondary component of your pack (liners, brushes, pumps, labels, seals) and write down its polymer or fibre type. Any mismatch with the main body is a candidate for the Dr. Beckmann treatment.
If you ship temperature-sensitive goods, test the full box with your own product, coolant and route before swapping insulation. Ask suppliers for third-party data, not just in-house results.
Measure the non-product mass on your pallets and shipments, including support beams, dunnage and fill, then ask what a lighter structure does to usable volume.
Treat “recyclable” claims as scheme-specific. A UK RAM rating helps under UK EPR; check the rules in each market you sell into, and check the official text or take legal advice where a claim carries commercial risk.
Ask suppliers for before and after weights on any redesign. The three announcements above would be easier to compare if they all published them.