Insulated Temperature Controlled Solutions

Versapak Insulated Thermal Medical Bags Temperature Controlled
Maintaining the integrity of specimens within a cold-chain with Versapak (PYTB) medical carriers

Versapak medical carriers are equipped with a padded protective insulation that maintains the temperature of the contents for up to 12 hours. These robust medical carriers provide laboratories and other medical users with a safe, secure and efficient way to manage any temperature sensitive biological material such as specimens and samples. Not only that, Versapak medical carriers are fitted with an internal pocket to hold a temperature monitor device that will record the internal temperature when in place, giving you peace-of-mind of the preservation of the contents. Medical carriers with external temperature displays are also available.

Tested and Approved

Versapak temperature testing of medical carriers

Our Medical Carriers that are listed below have been rigorously tested and checked to perform accordingly, in consultation with industries and their requirements. We worked with world renowned packaging testing organisation TÜV SÜD Product Service GmbH to test the efficacy of our carriers thermal capabilities. They found our insulated carriers can maintain temperatures of 2 - 8⁰C degrees for an average of up to 12 hours. Our largest medical carriers (PYTB3 30 litre internal capacity) performed beyond expectations, preserving the temperature for over 20 hours.  We tested our products extensively, in various ambient conditions.  The below gives guidance to the performance of each carrier in their prescribed conditions:



Sample Substitute (Litres)

Cooling Packs Grammes (Config)

Ambient Temperature

*Time before exceeding 8 degrees

Versapak Small Blood-in-Transit Bag

1 litre water

800g (2x 400g)

22 Degrees

12hrs 23min

35 Degrees

4hrs 7min

Versapak Large Blood-in-Transit Bag

1.5 litres water


(2x 600g, 1x 400g)

22 degrees

10hrs 19min

35 degrees

6hrs 13min

Versapak Small Insulated Medical Carrier

1.5 litres water

950g (1x 950g)

22 degrees

7hrs 46min

35 degrees

3hrs 44min

Versapak Medium Insulated Medical Carrier

5 litres water

2,250g (3x 750g)

22 degrees

15hrs 50min

35 degrees

7hrs 28min

Versapak Large Insulated Medical Carrier

7 litres water

3,300g (3x 1,100g)

22 degrees

20hrs 11min

35 degrees

9hrs 18min


All tests initiated with cooling packs frozen to -18 degrees. Additionally, sample substitute, carriers and any thermal barriers were conditioned to 4 degrees. For a complete copy of the test report, click here.


*The above is a guide. Modifications can be made based on the intended use and desired outcome for your intended use case. Preconditioning contents and carrier is advised.





All our carrier solutions are manufactured in various sizes and colours to suit your needs. We can even print your brand logos or hospital names. Why not ask us for a free quotation.

View our range of UN3373 & P650 compliant bags

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We are Versapak International Ltd and we help businesses store and transport documents and sensitive items. Our reusable and tamper evident bags, cash bags and varied use security seals are used by leading companies in many industries throughout the world.
The Versapak Centre, 4 Veridion Way
DA18 4AL
United Kingdom