Coffee scent - from an oil diffuser! Our unique coffee scent transforms any indoor area. 100ml (3.4 ounces) of dark, strong coffee-scented oil, in a glass diffuser bottle with collar and stopper, with natural diffuser sticks. This is an unusal diffuser and goes very well with our fresh bread scent. We recommend turning the reed sticks upside-down after 24 hours for best effect, thereafter infrequently as required.