The Caffeine Molecule Coffee Mug sports the polygonal structure of caffeine molecules. It’s pretty accurate too, with atoms identifiable by their size and the single and double covalent bonds as depicted by one or two lines between the atoms. The white and regular sized coffee mug is not a pretty thing by any standard. But if you know what C8H10N4O2 stands for, then it’s right up your alley. For the record, that’s the chemical formula for caffeine molecules composed of carbon, hydrogen, nitrogen and oxygen atoms. It’s also an ideal choice as a gift for geeks with a stellar track record of mixing up chemicals and running for the hills when it starts bubbling and accidently blows up. The mug is food-safe and made of kiln-fired glazed ceramic.