Rubber Hot Water Bottle With Cover Made of natural rubber Resistant to boiling water 100% leak proof Keep warm in winter Detailed TableMaterialNature rubberMaterial ... hot water bottle,2, Resistant to boiling water; 3, 100% leak proof4, Seamless moldedRubber content28%,30%,55%,etc.Cover1, Flannelet cover2, Knitted cover3, Coral fleece ...