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A mock advertisement styled like a product flyer. The headline reads "Introducing, from SMBC: 'PuCube™' — SEMI-PERMANENT TEA HEATER," with a subtitle in quotes: "15 cubic centimeters of equitably-sourced plutonium-238." A drawing of a large mug of tea contains a small glowing blue cube. Arrows point out features: "Tea remains hot for 2+ generations," "Emits charming glow," "Fits in your pocket," "Almost certainly no life in the tea," and "Meet your local FBI agent." A warning box at the bottom reads: "Do not swallow PuCube™. Please make financial arrangements for $400,000 cost. PuCube may be heavier than it appears. Do not swallow PuCube™." The joke is selling a deadly radioactive plutonium cube as a cute consumer tea-warming gadget. Votey: a follow-up ad reads "TRY AMERICI-CUBE! LASTS 4 TIMES AS LONG!" showing a mug of tea with a glowing cube inside, escalating the gag to an even more radioactive isotope.