Agree 100% In the meantime, is there any way you can fill up the cup with water before you hand it to them? Or make a show out of how hot and the coffee is, maybe say something like "Wow; look at the steam coming out of it!" and see if they agree, so they might clue into why their coffee isn't hot. Even better, if you're allowed to, fill up the coffee and hand them individual packs of creme and sugar for them to add. Or make a suggestion to your boss that "It would be nice for the customers to be able to personalize their coffee, kinda like how they can self serve their pop" That way the fatties will see the full steamy cup of coffee, and have to pour most of it out before adding cow juice.