You can use our mugs for coffee, but we've found they work just as well with many other types of beverages. For example, you might find yourself in a situation where you want others to think you're drinking coffee, but you're actually drinking something else. If that ever happens, then these are handy for that. The mugs measure 11 ounces, so not really going to hold a full can of coke, but they are made of premium ceramic, as opposed to the non-premium kind. We also picked one with a thick ass handle so they won't just randomly fall out of your hand. The lettering is printed on the surface, not with a marker, but with a fancy type of mug printer. The guy who made the mugs for us said you can put them in the dishwasher or microwave and they won't explode, or melt. We haven't tried that yet, but we're pretty sure it'll be fine.