Because you can never have too much C8H10N4O2.
Caffeine molecules support the dynamic polygonal structure of this extremely geeky espresso cup. Each atom is visible and is identifiable by its size, with the single and double covalent bonds represented by single or double lines.
This is real, non-toxic glazed ceramics, fired in a kiln. The size of a regular espresso cup, holds 2 ounces (60 ml).
Looking for a larger, mug size? Available here!