In 1892, British physicist James Dewar invented the Dewar flask, a double-walled glass vacuum flask for storing liquid gases. In 1903, his assistant, Reinhold Berger, improved the Dewar flask and applied for a German patent.
In 1904, Berger and others founded Thermos, a name that later became synonymous with insulated bottles. In 1907, Thermos was founded in the United States and began producing insulated bottles. In 1911, the first automated glassblowing machine for insulated bottles was introduced, enabling mass production. In 1913, William Stanley invented the stainless steel double-walled insulated flask, improving its impact resistance. In 1978, Thermos Japan developed the world's first commercially available stainless steel double-walled high-vacuum insulated bottle. In 1981, stainless steel vacuum insulated cups officially entered production. In 1991, the Thermos Group established a complete stainless steel insulated bottle production system. In 1912, Dewar bottles were introduced to China by Germans; in 1926, the first Chinese-owned thermos factory was established in Shanghai, and glass thermos bottles became widespread.
