![](https://retaildesignblog.net/wp-content/uploads/2012/04/Loewe-windows-2012-Paris-300x300.jpg)
![](https://retaildesignblog.net/wp-content/uploads/2011/03/Image-0032_1_720.jpg)
A sodium-acetate solution and a small metal disc enclosed in a pouch of flexible PVC —the user flexes the disc, and the pouch releases instant heat (54°C).The technology is simple.The substance inside the pouch, which has a freezing
point of 54°C, maintains its liquid state thanks to supercooling. Clicking the disc sets off a chain reaction (involving a crystallization process visible to the naked eye) that causes the temperature of the solution to rise to the freezing Thermo-Pad for a few minutes in boiling water, the user can repeat the process hundreds of times.The product is ideal for medical applications, as well as for outdoor activities and promotional goods.
![](https://retaildesignblog.net/wp-content/uploads/2011/03/Image-0032_2_720.jpg)