Each filter can hold enough grounds for 10-12 cups of coffee. These are cone style, but will also work for basket style. Each filter is made with unbleached cotton Muslin fabric.
Before first use, boil your filters for up to 5 minutes, rinse and use. No need to boil after the first time.
*washing instructions*
Hand wash with warm water, and hang or lay flat to dry, recommended to not use detergent. Filters will stain. This is normal and won't affect taste.