Looking to try a new pourover? Try the Chemex! This one piece heat resistant glass brewer was invented in 1941 and is made in USA . Brewing with the Chemex method allows you to brew ultra smooth, mellow coffee with little or no bitterness - simply by using bonded Chemex filters, which are thicker walled, the Chemex will leave out oils and solids that cause bitterness. Because of this, you can store chemex coffee in your refrigerator and reheat it as you wish!