... 2.size:31*20cm 3.capacity:2000ml PVC warm water bag 1.material:pvc,rubber2.size:31*20cm3.capacity:2000ml4.packaging:45 ... .5*35.5*28 instruction1. The hot water should be ... is not used, pour into a small amount of water or air, put it into a plastic bag and ... , alkali, oil or sharp objects. Please avoid heavy pressure. PVC warm water bag