Constant temperature, long-lasting, safe and explosion-proof warm winter artifact. This hot water bag keeps warm for 6-8 hours after being filled with hot water. It has a leak-proof design and is warm without burning your hands. It is suitable for warming your hands in the office, warming your abdomen during menstruation, or pre-warming your bed in winter. It is a soft weapon for cold-shy people to fight against the cold winter!
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