Aeropress filters are simple little paper or steel disks which are inserted into the cap. The coffee grounds are then poured into the cylinder, on top of the filter, and pressed. There are two variations of these filters.
One of the biggest features of the Aeropress is how quick and easy it is to use and clean. Paper filters are the only disposable part of the coffee brewing process. If you don’t want to bother with paper filters anymore then a stainless steel filter is a perfect replacement solution.