These filters ensure optimal use of Hario's V60 method. Hario is a Japanese company established in 1921. Dedicated to designing, manufacturing and selling heat resistant glass. During its establishment, the focus was on glass products for laboratories and medical applications. After the Second World War, the production of household items began, the first item being the coffee siphon. Since then the company has grown into a producer of coffee and tea accessories. Today, they are popular among a lot of coffeelovers.