Our 'Liquid Radioactive Materials' coffee mug. Clearly indicates it would be better to steal someone else's cup as there are radioactive Uranium and Plutonium particles floating around in this coffee! Mug reads: "Radioactive Materials, Contains Fissile 235U and 238Pu in Liquid Suspension." Like all our mugs, this one is printed in full color, on a high gloss, 12 ounce ceramic coffee mug - dishwasher safe of course. Graphic appears on both sides of the mug.