These coasters will light up when you place your drinks on them. To call the Radioactive Elements Glowing Coaster Set a must have for chemistry experts won’t be much of an exaggeration. They are pressure-sensitive coasters which is why you’ll get to see them light up everytime you place your drink on them. The radioactive elements you’ll get to choose from are Radium-226 (Red), Plutonium-244 (Blue), Uranium-238 (Green) and Thorium-232 (Orange). The fact that the coasters feature the atomic number and the isotopic mass of every element will only make you want them even more. Ready to party hard?