... Made of natural rubber Resistant to boiling water 100% leak proof Keep you warm in winter Detailed TableMaterialNature rubberMaterial of ... water bottle,2, Resistant to boiling water; 3, 100% leak proof4, Seamless moldedRubber content28%,30%,55%,etc.Cover1, Flannelet cover2 ... meet environmental requirements.3. The products after 100%pressure leak detection test.The hot water bag is made of by Natural ...