... copperVol / size300ml – 2000mlFeature1, First grade natural rubber hot water bottle,2, Resistant to boiling water; 3, 100% leak proof4, Seamless moldedRubber content28%,30 ... .Tips:1. When you are filling the bag, do not use boiling water, about 85°Cis suitable.2) Fill the bag in ... , check the stopper components at regular intervals5) When not in use, drain and store with the stopper removed in a cool ...