... bag, each bag weigh only several to twenty grams only,to save shipping cost.Sanitation, convenience:You can use ... can insert the water tap in the jaws to fill water, the water will not leak, then ... the gel crystals turn to gel, and then it can be used after ... - for cold-preservation and fresh-preservation during transporting, applicable to: a. Live shrimp, fish, crab, conger eel, ...