insulated box (M) 300 x 300 x 300 mm — complete incl. 2 Isoliners

Insulated box (M) — complete cardboard cooling box per unit: corrugated cardboard outer box 300 × 300 × 300 mm including 2 Isoliners. Everything you need for one full-fledged, fully recyclable cold chain packaging solution to ship your products chilled — the plastic-free alternative to EPS and polystyrene foam.

What’s included?

Per unit, you receive the corrugated cardboard outer box and the 2 matching Isoliners — paper insulation sheets that line the entire inside: base, walls, and top. Set up the box, place the sheets inside, pack: done. Do you ship regularly? Order the Isoliners separately at an attractive price as a refill: Isoliner sheets (M) — 42 sheets for 21 boxes.

Why choose a cardboard cooling box with separate sheets?

This system is designed for businesses that want to store compactly and package sustainably. The box is delivered flat and the sheets are stored flat — you only assemble the cooling box when packing. This saves a significant amount of storage space and transport volume compared with pre-formed EPS boxes. And after use, both the box and the sheets can simply go with the waste paper, without a separate collection point. The insulation performance is comparable to EPS (polystyrene foam/Tempex).

Specifications

• Dimensions (L × W × H): 300 × 300 × 300 mm
• Contents per unit: 1 corrugated cardboard outer box + 2 Isoliners (insulation sheets)
• Material: 100% paper and cardboard, fully recyclable
• Refill: separate Isoliner sheets (M) — 42 sheets for 21 boxes
• Exterior: flat and fully printable (brand, logo, user instructions)
• Delivery: supplied flat, space-saving in storage

How to assemble the cooling box

1. Set up the box and place the two included Isoliners so that the base and walls are lined.
2. Place your product inside and add gel packs — gel packs on top of the product, because cold air sinks.
3. Fold the sheets closed and seal the box. Pack as tightly as possible: less empty space means a more stable temperature.

What is the M size suitable for?

The M is the most popular mid-size option and suits most chilled parcels: medium-sized shipments of fresh fish or meat, dairy, meal boxes, chocolate, and pharmaceutical products. With the right gel packs, you can keep the contents at the right temperature for up to 48 hours, from chilled (2–8 °C) to frozen — without refrigerated transport.

Benefits for e-commerce and fresh brands

More and more online stores and brands are being assessed on sustainability. With this box, you package fully plastic-free and recyclably, with a clean appearance on your customer’s doorstep. The flat exterior is also fully printable. Unsure which size suits your product and transit time? Our specialists are happy to advise you.