Since 2001 Shanghai World Biotech has been a leading manufacturer of Hot & Cold products. We take this market knowledge and product expertise and build it into every product we make. Through patented technologies, unique materials, and flexible manufacturing we can make the right product at a value that will astound you every time. Our all-around product lineup includes hot/cold packs, hot packs, instant hot packs, ice packs, ice boxes, eye masks, shoulder packs, bottle coolers, insoles, etc.