How to Pack and Ship Perishable Goods Safely

This guide explains how to ship chilled food safely using the right insulated packaging and protective materials. We outline essential packing steps, explain when to use cardboard outers and provide simple, reliable advice to help your perishable products arrive fresh, secure and in the best possible condition.

Why Proper Packing Matters

When sending perishable food, packaging does more than keep items cool - it protects your reputation.

Couriers don’t handle parcels gently, and temperature control can make or break your customer’s experience. Even the best thermal materials need the right packing method to perform properly.

This guide explains how to get the most from your JB Packaging insulated boxes so your produce arrives safely, fresh, and in perfect condition.

Choose the Right Packaging Solution


  • At JB Packaging, we supply a range of insulated boxes to suit different transport needs.

    Understanding the difference between options is key to preventing damage or spoilage.

  • EPS Box Only

    Ideal for internal transport, short-haul deliveries, or when items are carried in bulk within a larger protective container.

    EPS (expanded polystyrene) provides excellent insulation but is not designed to withstand the knocks and drops of courier networks on its own.

    Shop EPS Only Boxes 

  • EPS Box with Cardboard Outer

    Best for shipping perishable goods via courier or postal services.

    The cardboard sleeve offers critical impact protection and supports labelling for fragile or perishable contents. Adding a cardboard outer ensures both physical and thermal protection!

    Shop Poly Boxes with Cardboard Outers 

How to Pack Perishables for Delivery

  • Pre-chill or freeze your goods

    Ensure your items are already at the right temperature before packing. Packaging maintains temperature, it doesn’t create it.

  • Pre-cool the insulated box

    If possible, store your EPS box in a chilled area before packing to reduce temperature shock.

  • Use the right amount of coolants

    Add water ice packs, gel packs or dry ice depending on your product’s needs. Always follow courier and safety guidance for dry ice.

  • Line and seal carefully

    Use a liner bag or film to contain condensation or meltwater. Seal tightly to maintain the cold air barrier.

  • Add a sturdy cardboard outer

    Always place the insulated box inside a corrugated carton for postal or courier deliveries. This prevents crushing and improves stackability.

  • Label correctly

    Mark your parcel with “Perishable,” “Fragile,” and “This Way Up.”

    This signals careful handling to couriers and helps maintain compliance with most shipping partners.
Follow the above steps to preserve freshness during delivery.

EPS Thermal Performance Explained

EPS (Expanded Polystyrene) is one of the most cost-effective and reliable thermal insulators for chilled and frozen goods. Its closed-cell structure traps air and slows heat transfer, keeping contents cold for hours when used correctly.

That said, insulation alone cannot control temperature. Coolants are essential for maintaining low temperatures during transit, especially over long distances or in warm conditions.

Proven Thermal Performance