Filter cups are the best way to make a single cup of coffee. Just place on top of a cup, put a paper filter inside, insert a tablespoon of coffee and slowly pour extremely hot water over top. When every guest wants a different flavor coffee, no problem, fill each filter cup with the chosen flavor. If traveling and only have access to hot water, bring your filter cup and make a cup of coffee without having to plug in a coffee pot. If the electricity is out, boil water on a campfire and never have to go without morning coffee again.