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In the case of sudden temperature changes in winter and spring, the number of patients increased sharply, and the hospital was overcrowded. I accidentally saw a grandfather in the hospital with an infusion tube in his mouth to heat his grandson's potion. This also inspired my design thoughts, so I designed such a spiral infusion heater, which is convenient and compact, close to the infusion tube, without any extra and waste. The hard plastic shell provides protection, and the inner non-woven fabric contains iron powder, which generates heat through an oxidation reaction. Bright candy colors bring warmth and life is fun.