Insulated Envelopes

CooLiner insulated pouches are thermal mailers designed for shipping flat or small-sized temperature-sensitive goods.

In the event the size of your payload exceeds the capacity of our thermal envelopes, our insulated box liners fill the need to ship “smaller than a pallet but bigger than an envelope” shipments with a guarantee that the temperature of the products being shipped remain largely unchanged throughout the cold-chain distribution system.

CooLiner thermal pouches can be quickly filled with your temperature-sensitive goods and sealed with an advanced adhesive strip in a matter of seconds. Our insulated pouches provide the easiest method of shipping your small-sized items.

Custom sizes and minimum order quantities

We can provide custom sizes to suit your exact requirements at no additional cost. Get in touch to discuss your requirements.

The minimum order quantity for Insulated Pouches is 1000 sets/pcs per size. Learn more about our minimum order quantities here.


  • Protection for over 24 hours

    The thermal envelopes provide effective temperature control for over 24 hours.

  • Leak-resistant design

    Prevents moisture ‘sweating’ on product.

  • Easy and quick to use

    Instantly seal the one-piece thermal pouches with the Peel-and-Seal adhesive lip closure.

  • Clean and professional presentation

    Stay aligned with your brand image.

  • Ideal for flat products

    Perfect for small food items, medical supplies, and other temperature-sensitive items.

  • Raw materials approved by the FDA

    In cases of incidental food contact.

  • Use with GelTech Gel Packs

    Enhance the performance of your insulated mailer by using it in conjunction with our GelTech cold packs.

Single vs. Double Bubble

The Insulated Pouches are available in Single Bubble or Double Bubble form, depending on your performance requirements. Click and drag the slider below to compare the two versions.

Single Bubble

Suitable for shiments lasting 24 hours.

Double Bubble

Suitable for shiments lasting up to 48 hours.

Watch the demonstration video to find out how quick and easy it is to use CooLiner insulated pouches.


What is CooLiner?

Made with a combination of metalized films and air bubbles, CooLiner material is an innovative type of insulated packaging that effectively protects shipments against extreme ambient temperatures.

Lined with a silver bubble wrap, these pouches give you all the flexibility you need. They are available in any custom size, and they can be filled and sealed in seconds.

Also available as a box liner, pallet cover or cargo blanket, CooLiner is recommended for protecting shipments for durations lasting 24 hours.

How does CooLiner work?

Our proprietary insulation technology, exclusively available at IPC, perfectly combines heat reflection and mass. In comparison to similar materials with a higher relative thickness, CooLiner provides superior temperature control.  It is the dual performance of the reflective outer layer and low thermal mass that allows CooLiner to outperform other similar products.

Reflective Foil Layer

The foil outer layer serves to prevent heat from radiating into the shipment. This works using the properties offered by this aluminized layer that allow it to receive and bounce away heat energy at a subatomic level.

Advanced Bubble Layer

With a unique structure carefully designed to inhibit conductive heat flow, CooLiner material can provide superior thermal protection to even thicker, heavier films.

The result of 11 years of research and development, our bubble insulation technology has, time and time again, proven to provide real-world efficacy.

Why is the CooLiner superior?

Unparalleled performance.  It provides a level of temperature control unparalleled in the industry.

Reduced operational costs.  CooLiner helps you to keep your work area efficient with quick and easy application. Another benefit is that CooLiner can be compactly folded away when not in use, providing valuable savings in warehousing and shipping.

Durable, puncture-proof and water-tight. CooLiner material is safeguarded against rips during transit, allowing you to rest assured your shipments will reach their destination without damage.

Performance Testing

Refrigerated Product – 48-Hour Transit in Summer

Box Size:
ID Size:
Container Used:
Container Compared to:
Weight Shipped
Pre-Shipment Temp:
Refrigerant Used:
3 lbs. Foil-Wrapped Gourmet Chocolate
10” x 10” x 10”
10” x 10” x 10”
Carton Lined with CooLiner Box Liner
10” x 10” x 10” Carton with 6 pcs. ½” Styrofoam Inserts
8 lbs.
55 °F
1.5 lbs. (1 gel pack at 1.5 lbs)

Related Products

GreenLiner Insulated Pouches

These self-inflating insulated pouches arrive in patented large compression sleeves and inflate when removed from the sleeve.

CooLiner Insulated Bags

CooLiner To Go is an insulated bag that effectively keeps shipments within a controlled temperature range for over 24 hours.

All our products are developed and manufactured from our factory in the USA.

Want to know more about our Insulated Pouches?

Call us, we are here to help:

310 638 0900