Fire in the hole! Something is going to explode for sure, but it’s not going to be the Mug itself, because it’s actually not a real Grenade! Reading the inscription on the cup, it’s more likely for its owner to erupt, when there are too many people complaining to him about something! Damn it, can’t you just leave a man alone for a minute, so he can have his coffee in peace?! Perfect for a gift to a friend or a co-worker!