杜華罐（cryogenic storage dewar），也稱真空罐、低溫儲罐，是工業界用於儲存液氮、液氦等低溫液態氣體的真空絕熱容器，由蘇格蘭物理學家兼化學家占士·杜華（James Dewar）發明，有很好的絕熱保溫效果。
參見
相關專利
- Burger, R., 美國專利第872,795號, "Double walled vessel with a space for a vacuum between the walls", December 3, 1907.
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