Spectra : Antibacterial Nano Silver Ice Pack
The material from which the bag is made prevents the propagation of the microbes. How to use: put the bag in the freezer and leave for at least 5 hours. The product keeps you cool 2-3 times longer than ice. To maintain a low temperature, place the ice bag near the container.
Before use: fill the pack with water until the water indicator, the auto shut-off valve will seal the pack completely, freeze for at least 5 hours & Reusable