A hot beverage that is made by filtering hot water through ground coffee beans, popular for its aroma and concentrated dose of caffeine. Use this tag when coffee itself (ordinarily a black or dark brown liquid) is visible in an image.
It is normally served in a porcelain mug, but it can be taken on the go in a stainless steel mug or styrofoam cup. Modern coffee shops often use disposable paper cups with a snap-on lid and an insulating cardboard sleeve, as seen in post #3022878. These should be tagged coffee cup. For the traditional porcelain or ceramic "coffee cups" that aren't mug-shaped, see teacup.