Mob Cap: Simply center the coffee filter on your doll's head and secure it with a large clear elastic. Tie a ribbon around it to embellish, and add flowers with tape or glue if you like.
Simple Bonnet: Fold the filter in half and place on top of your doll's head with the rounded edge facing forward. Cut a length of ribbon to go across the top and tie under the chin.
Chef's Hat: Start like the mob cap, and then carefully pull up the middle section of the filter until it makes a large poof. Then tie a wide piece of white ribbon around your doll's head for the rim. Make an apron out of more coffee filters.