保温瓶 Traditional form: 保溫瓶 Pinyin (reading): bǎowēnpíng Definitions: thermos Characters: 保 - to safeguard, to protect, to defend, to care for 温 - warm, lukewarm 瓶 - bottle, jug, pitcher, vase Traditional characters: 保 - to safeguard, to protect, to defend, to care for 溫 - warm, lukewarm 瓶 - bottle, jug, pitcher, vase