Precautions: 1. For safety and extend the life of the hot water bottle, please do not splash boiling water, usually 80C/176F. 2. Remember to only splash 2/3 of the hot water into the hot water bottle. It should not be filled to avoid expansion of the bag. When the lid is unscrewed, the hot water overflows and burns. 3. After screwing on the cover, be sure to check for water leaks and water stains not wiped dry. The practice is as follows: a) First check whether the cover is tight . b) Dry the water stain at the mouth of the hot water bottle with a dry cloth and inspect it carefully. c) Lift the end of the hot water bottle face down , shake vigorously and carefully observe whether there are water drops. If there are water drops, please follow steps a and b to check the product until the product quality problem is solved . Make sure the hot water bottle itself is not leaking. Advantages: a) Keeps you warm for a long time Daily use to keep warm b) Relieve cold and cough Relieve the discomfort caused by cold or cough c) Lower pain Lower pain in shoulder , neck, back etc. Great gift for family members and friends Winter is coming now. Festivals are coming gradually, choose a warm gift for your family members and friends with ZUOMIDIE hot water bottle.