Reusable Organic Cotton coffee sock. 
Each coffee socks lasts about 1 year and replaces approximately 500 paper filters. 
Directions: Boil filters in fresh water for 10 minutes to sanitize and preshrink. Rinse well.
 Fit filter around mouth of jar pour one cup of coarsely ground coffee into filter. Pour water into open filter until grounds are thoroughly wet, and jar is nearly full. Close in jar and top off with fresh water. Secure lid and set in refrigerator for 6-10 hrs. Remove filter, discard grounds, rinse filter thoroughly and hang to dry.