Radioactive Elements Coaster

Featuring the atomic number and isotopic mass of the most stable or common isotope for their respective radioactive elements, these pressure-sensitive coasters light up when you put your drink on them. Choose to set your drink down on: Curium-247 (Red), Einsteinium-252 (Blue), Fermium-257 (Green), Meitnerium-268 (Orange) . Set of four comes in a box with the radioactivity warning symbol.