As the sole heatproof glass manufacturer with a working factory in Japan in 1921, HARIO has long been dedicated to the design and production of its unique glass. After World War II, the production of household items started with the coffee syphon, which has become an icon of the company. Since then, the company has expanded to the creation of fine coffee and tea equipment, as well as microwave-safe kitchenware that are each produced to the highest quality.