1.become gel quickly after fill in water. 2. It is clean, nontoxic 3. CE, SGS, MSDS,ROHS, etc. 4. OEM is available Water Filling Ice Packs1. IntroductionIt made of high polymer, which is nontoxic, clean, safe and environmental. The opening cans airproof by itself. After adding water, the polymer in bag will quickly absorb water and became gel. The gel is stretch and has a good effect of storage. ...