Designed to aerate and oxygenate coffee or wine! Provides enhanced engagement with the brew after extraction. Can be used to aerate smaller 10oz. - 20oz. batches or brew up to a full 40oz. pot of coffee. The Patented filter system eliminates sediments, bitterness, undesirable and unhealthy elements from your coffee. Made from non-porous borosilicate glass which will not impart any flavor or chemical residue into the coffee.