How do you use an instant ice pack?
An instant cold pack is a device that consists of two bags; an internal bag containing water, and an organic compound called urea. When the inner bag of water is broken by squeezing the package, it is allowed to dissolve the solid in an endothermic reaction. This reaction absorbs heat from the surroundings, quickly lowering the pack's temperature. Instant cold packs are a convenient direct replacement for crushed ice used as first aid on sport injuries. They are very easy to use, simply squeeze the inner button and shake. This will activate the cold pack making it cold within seconds; then place on the injury.