... etc. with reasonable price. :Purpose:1. Long-distance cold storage and transportation of biochemical reagent, veterinary drug, plasma, vaccine, ... and keep cold, release cold and keep refrigerator at the refrigerating temperature when power off.Usage:Put this product into freezer to be ... : ice pack, ice box, blue ice, ice king, hot/cold pack, gel pack, reusable gel pack, instant ice pack, disposable ...