Defend the planet…. from water mark stains from your drinks. Battlestar Galactica Cylon Coasters are tin topped with a cork backing. Sure Cylon’s in “real” life are trying to destroy all humans but the best way to stop them is clearly by placing a heavy glass or bottle on top of their creepy cybernetic warrior red eyed faces. Now grab a drink and let’s go search for a mythical place I’ve only read about called “Earth”.