Used aero press coffee maker. Components ran through the dishwasher before listing. Some additional filters included with purchase! PATENTED 3-IN-1 BREW TECHNOLOGY: The only press that combines agitation and pressure with micro-filtration so you can use finer ground coffee. Hot water is pushed through the grinds, quickly aerating and extracting only the purest, freshest flavors, while keeping grit and bitterness out of your coffee.