Feeling punchy today? Grab your cup o' joe and let it speak for itself with a Fisticup Knuckleduster Mug! Not just your average coffee cup: this full-on ceramic knuckle mug has a brass knuckle attached so you feel a little tougher with your cup of black coffee. And besides, no one wants to mess with the guy who has knuckles dusters on his coffee mug, so you get the added benefit of being left alone to enjoy your brew. Try not to crush the Fisticup Knuckleduster Mug with your maddening grip!