Kangaroo Mailer

These insulated envelopes contain compressed, self-expanding foam that inflates when punctured, creating a form-fitting enclosure that protects and thermally insulates fragile and perishable items. Simply pierce the outer film of the foam expansion mailer and watch it expand to its original size.

When temperature-sensitive vaccines, biological samples, and medicines leave your hands for sale, research, or manufacturing, how can you be sure that unacceptable temperatures won’t compromise their quality during transit?

Refrigeration equipment is not always reliable, and temperature can vary within a shipping container, delivery vehicle, lab, or collection site. Your products may pass through multiple handlers during the sample collection, manufacturing, or distribution process, possibly enduring delays and substandard intermediate storage.

A cold chain breach might go unnoticed at first, but poor temperature control can lead to ineffectiveness, contamination, bacterial growth, and infection. Unknowingly mixing, processing, or selling compromised pharmaceuticals or samples can have devastating effects in the health field, where safety is of primary importance. Plus, having to dispose of compromised drugs and contaminated samples can waste precious research time, money, and biological donations.

Thermal Shipping Solutions specializes in a wide variety of insulated packaging products for your cold chain shipping requirements. We are very excited to offer a product designed especially for the secure shipping of pharmaceuticals and other sensitive items vital to the health and science industries: The Kangaroo Mailer!

The envelope is provided in a convenient compressed form of roughly 5/8” which expands to almost 3” after it is packed, sealed, and ready for shipping. It does not require an outer carton and comes with clearly printed instructions. Simply fill the insulated envelope with your refrigerant and thermally sensitive items, seal with the attached tamper-resistant pressure-sensitive tape, puncture the marked targets, and apply your postage label.

The envelope is insulated by a 1” or 1-3/8” piece of foam sealed in a durable plastic liner designed to maintain integrity and strength when used with standard refrigerants. The foam provides valuable cushioning, form-fitting crush resistance, and superior thermal properties.

Are you a customer of our competitor Xpander Pak?  Our Kangaroo Mailer consistently outperforms the Xpander Pak because our envelopes utilize a single compressed foam insert as opposed to two smaller foam inserts like the Xpander uses.  The single piece design improves the edge seal by reducing compression seams by 22%.


Picture of KM-21214
Our most popular size. Ideally suited to ship insulin prescriptions with minimal cost and material use. 48 units per case.
Picture of KM-11214
Space and cost savings make this a great EPS replacement for all sorts of temperature sensitive items. 48 units per case.
Picture of KM-2911
This compact mailer is used primarily by the compounding pharmacy industry. 72 units per case.
Picture of KM-1911
This compact mailer is very popular in biological specimen shipping and vaccines. 72 units per case.
Picture of KM-21418
Larger shipments at the absolute minimum dimensional weight. Most often used for chocolates and specialty medications . 24 units per case.