The earliest version of instant coffee was patented in 1881, but it didn't gain popularity until the early 20th century.

最早的速溶咖啡於 1881 年獲得專利，但直到 20 世紀初才開始流行。

It became widely used during wartime for its convenience and long shelf life, making it a staple in soldiers' ration kits.

戰時，它因其方便和保質期長而被廣泛使用，成為阿兵哥口糧包中的主食。