... - cold effectiveness longer - More cheaper; Carry advantage Fill water ice gel pack-400ml-reusable capability: 400ml size: ... convenience:You can use this Ice gel pack just after fill water and freeze.This Ice gel pack not ... can insert the water tap in the jaws to fill water, the water will not leak, then the ... upon the order.Material: polyethylene, crystals Fill water ice gel pack-400ml-reusable