IN Brief:
- Hydropac calculates substantially different EPR fees for 500g water and gel coolant packs.
- The difference arises from whether only the film or the full filled-pack weight is treated as chargeable packaging.
- Food businesses need accurate component weights, classifications, supplier data, and responsibility records across complete cold chain packs.
Hydropac has calculated that UK extended producer responsibility fees could differ substantially between gel- and water-based coolant packs used for chilled and frozen food distribution.
Under the classification used in its analysis, only the outer plastic film of a conventional water ice pack is counted as chargeable packaging, while both the film and contents of a gel pack contribute to the declared material weight.
A 500g water pack would consequently attract an estimated disposal fee of approximately 0.55p, compared with around 14.3p for a gel pack of the same nominal weight. Across high-volume meal-kit, grocery, meat, dairy, seafood, and ingredient shipments, the difference can become a substantial annual cost.
Large producers meeting the applicable turnover and packaging-volume thresholds must report packaging data and pay waste-management fees, while smaller organisations can retain reporting obligations depending on their size and activity. Businesses must also establish which legal entity is responsible when products involve contract packing, imports, own-label supply, or third-party fulfilment.
Coolant packs have traditionally been specified around temperature range, conditioning time, thaw behaviour, leakage risk, physical dimensions, and unit price. Extended producer responsibility adds declared weight and material classification to that calculation.
The outer film represents only a small part of a filled water pack, whereas a gel formulation can account for nearly all its weight. Where the contents are classified as packaging, the fee calculation changes even though both products perform the same broad cooling function.
Thermal performance still governs selection
Replacing gel with water is not a direct administrative substitution because the two systems can behave differently during freezing, handling, transit, and thawing. Gel may retain its shape more effectively, remain flexible at certain temperatures, or provide a specific cooling profile needed by the payload.
Water packs can offer faster conditioning and simpler disposal in suitable applications, although pack geometry, leakage behaviour, condensation, and product contact must still be assessed. A change that reduces EPR fees but increases product-temperature failures would create greater waste and cost elsewhere.
Validation needs to cover the complete distribution route, including payload mass, insulation, pack configuration, ambient exposure, delivery duration, handling delays, and the required product-temperature limit. Laboratory testing should be supported by monitored field trials where real routes produce more variable conditions.
Frozen products, chilled meals, meat, dairy, and temperature-sensitive ingredients do not share one thermal profile. A pack suitable for overnight chilled delivery may not provide adequate protection during an extended frozen route or a shipment exposed to repeated door openings.
The analysis also needs to include conditioning energy. Packs that freeze more rapidly can reduce freezer load or increase daily capacity, while slower products may require more storage, longer lead times, and additional equipment during peak periods.
Packaging format decisions are increasingly being made against several cost categories at once. The move towards recycled aluminium wine bottles at Kingsland Drinks similarly combines container weight, freight, breakage, line capability, recycled content, and producer responsibility fees within one investment decision.
Complete pack data will determine exposure
Accurate EPR reporting depends on controlled information covering material type, component weight, recyclability, country of supply, and the organisation placing the packaging on the market. Those records are often distributed across procurement, technical, finance, packaging development, logistics, and external suppliers.
Nominal weights held in purchasing systems may not match actual specifications, particularly after a supplier changes film thickness, pack dimensions, or formulation. Version control and change notification are therefore essential if reported data are to remain accurate.
Coolant packs represent only one part of a temperature-controlled shipment. Insulation, liners, cartons, tapes, labels, dividers, and pallets all contribute to material use, fee exposure, freight weight, and end-of-life performance.
Optimising one component in isolation can transfer cost elsewhere. A lighter coolant may require more units, thicker insulation, or a larger case, while a smaller outer box could reduce airflow or change how packs are positioned around the product.
Complete-pack assessment should combine thermal validation, material weight, EPR fees, packing labour, freezer demand, transport utilisation, failure rates, and customer disposal. The lowest-cost component does not necessarily produce the lowest-cost distribution system.
As fee schedules become embedded in annual budgets, cold chain packaging will receive closer engineering and financial scrutiny. Reliable classifications and measured pack data will distinguish genuine savings from changes that merely shift cost between material, energy, freight, and product loss.
