Coffee stains can be stubborn to remove from fabrics, but there are several options you can try. Among the options given, a solution of borax in water can be effective in removing coffee stains. Borax is a natural mineral compound that has cleaning and bleaching properties, making it useful for removing stains. To use it, you can mix a small amount of borax with water to form a paste and then apply it to the stain. Let the paste sit for a few minutes before washing the fabric as usual.