Cheesecloth and muslin bags are the preferred wrapping material for bouquet garni (AKA flavorful little bundles of tasty herbs and other flavourings), but a simple coffee filter can be used with the same results. Photo by Samantha Celera.
Not only I am much more likely to have coffee filters on hand than cheesecloth, but coffee filters are much cheaper (and compostable!). To make a little infusion packet for soups, teas or tinctures, place your ingredients in the centre of the filter, tie it up with a bit of twine and submerge until your liquid is properly flavoured. Remove, toss into the compost and repeat as needed.
12 Uses for Coffee Filters (Other Than for Coffee) [Epicurious]