A brand of reusable metal filter for drip The process of making an infusion of water and roasted, ground coffee. In the most basic sense, hot water is added to coffee ground to produce a drink. Some brewing methods (espresso, turkish coffee) produce More. Swissgolds are alternatives to paper coffee filters. They have the advantage that they do not impact a taste to the cup (paper filters can give a paper-y taste), and they are reusable. Swissgolds have larger pores than paper filters, which means larger particles make their way into the cup.