Toddy filters are uniquely designed specifically for cold brew filtration, extracting all the natural and delicious flavors of coffee and tea, and leaving behind the bitter acids and oils attached to their warm brew counterparts. In that sense, Toddy Filters are what makes the coffee that millions have sworn by since 1964. Filters are suggested to be changed after 10 to 12 uses or after three months, whichever comes first. Cleaning simply requires rinsing under running water to remove any residue, squeezing off any moisture, and storing in an airtight container in your refrigerator or freezer in between uses. No soap needed. Toddy Filters are made and manufactured in the USA.