Rubber Hot Water Bottle With Cover Made of natural rubber Resistant to boiling water 100% leak proof Keep warm in winter Detailed ... / size300ml – 2000mlFeature1, First grade natural rubber hot water bottle,2, Resistant to boiling water; 3, 100% leak proof4, Seamless moldedRubber content28%,30 ... use, drain and store with the stopper removed in a cool, dry and dark place.6) Do not let the ...