Read Edit View history 瓶胆 píngdǎn thermos liner Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 瓶胆/瓶膽 · píngdǎn · thermos liner 2026/03/04 瓶胆 / 瓶膽 píngdǎn thermos liner The vacuum bottle within the outer case of a thermos. 我不小心把热水瓶的瓶胆摔碎了。 noun created sense Mar 4, 2026, 02:25 AM