Our insulated shipping boxes with thermal liners provide a convenient and professional way to transport products that need protection from temperature changes.

Each packaging solution includes a durable cardboard shipping box and a correctly sized reflective thermal liner. This removes the need to source the box and insulation separately while helping ensure that the liner fits securely inside the outer packaging.

Available in five practical sizes with capacities ranging from 12kg to 42kg, these insulated boxes are suitable for everything from smaller direct-to-customer orders to larger commercial shipments.

Available Sizes and Capacities

Choose the most appropriate insulated shipping box for your products, packing materials and required coolant. All dimensions are shown in millimetres:

• 230 × 230 × 230mm – approximately 12 litres
• 305 × 229 × 229mm – approximately 16 litres
• 300 × 200 × 400mm – approximately 24 litres
• 305 × 305 × 305mm – approximately 28 litres
• 457 × 305 × 305mm – approximately 42.5 litres

When selecting a size, allow enough room for the product, thermal liner, coolant packs and any protective void-fill material. Avoid choosing an unnecessarily large box, as excessive empty space can affect the consistency of a temperature-controlled shipment.

Thermal Protection for Sensitive Products

The reflective liner creates an insulating barrier around the contents of the box. Its foil surfaces and enclosed air-bubble layer help reduce heat transfer into or out of the package, supporting a more stable internal environment during storage and delivery.

These insulated delivery boxes can be used for chilled, frozen or ambient products. For shipments requiring active cooling, combine the box with a suitable quantity of conditioned gel packs or cool packs.

Suitable Applications

Our insulated shipping boxes are suitable for transporting:

• Chilled and frozen food
• Fresh meat, fish and dairy products
• Meal kits and prepared meals
• Fresh produce
• Drinks, juices and specialist beverages
• Pharmaceuticals and healthcare products
• Cosmetics and skincare products
• Chocolate and confectionery
• Flowers and other delicate goods
• Laboratory samples
• Temperature-sensitive industrial products
• Subscription-box products

A Lightweight Alternative to Polystyrene Boxes

Traditional expanded-polystyrene packaging can be bulky to handle, store and dispose of. Our foil-lined insulated boxes provide thermal protection in a lightweight, compact format.

The cardboard boxes and thermal liners are supplied flat-packed, allowing businesses to store more packaging in less warehouse space. Businesses can then assemble each box as needed, making the system suitable for both occasional shipments and regular fulfilment operations.

Their lightweight construction also reduces unnecessary packaging weight while giving customers a clean, professional unboxing experience.

How the Insulated Box Liner Works

The thermal liner uses reflective foil and an enclosed air-bubble layer to help limit heat transfer through radiation, conduction and convection.

Once assembled inside the cardboard box, the liner surrounds the products and forms a protective thermal barrier. Closing the liner securely helps reduce the influence of changing external temperatures during delivery.

The packaging slows temperature change but does not actively cool the contents by itself. Chilled and frozen shipments should therefore be packed with appropriately conditioned gel packs or cool packs.

How to Pack an Insulated Shipping Box

For effective and consistent performance:

1. Assemble the cardboard outer box.
2. Open and position the thermal liner inside the box.
3. Pre-condition the products to the required starting temperature.
4. Add the products and the appropriate coolant packs.
5. Use suitable void-fill material where necessary to reduce movement and space.
6. Close and secure the thermal liner.
7. Seal the cardboard box ready for dispatch.

Coolants should be distributed around the products according to your tested packing method rather than placed in only one area of the box.

Temperature-Controlled Packaging Performance

The temperature and duration achieved will depend on several factors, including:

• The chosen box size
• Product starting temperature
• Product weight and thermal mass
• Required temperature range
• Type and quantity of coolant
• Position of the coolant packs
• Amount of space
• External weather conditions
• Delivery route and transit time

We recommend completing temperature trials using your actual products, selected box, coolant and delivery route before beginning commercial shipments. This will help confirm that the complete packaging system is suitable for your required temperature range and delivery period.

Easy to Store and Assemble

Both the outer boxes and thermal liners are supplied flat-packed for space-efficient storage. They can be assembled when required without specialist equipment, making them suitable for warehouses, food producers, pharmaceutical suppliers, online retailers and fulfilment centres.

UK-Manufactured Thermal Packaging

Our thermal liners are manufactured in the UK for dependable quality and supply. By combining a sturdy outer box with a lightweight reflective liner, this packaging provides a practical solution for businesses sending temperature-sensitive products throughout the UK.

Choose from five sizes and capacities to create insulated packaging suited to your products, coolant requirements and delivery operation.