Let's just admit it, we all need Caffeine to get through the day.  Why not at least show off your love of science and spelling and keep your beautiful table safe from evil water rings while you are drinking it.  These 5 coasters use the periodic symbols for Calcium, Flourine, Iron, Iodine, and Neon to make your coffee table the talk of Somerville. You can even help your students study for their next Chemistry test.