Because you can never have too much C7H8N4O2.
Theobromine is the primary alkaloid found in cocoa and chocolate (like caffeine in coffee). Shapes of the molecules support the dynamic polygonal structure of this extremely geeky chocolate mug. 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 porcelain, fired in a kiln. The size of a regular coffee mug, holds 7 ounces (207 ml).
Looking for the caffeine molecule version? Available here!
Looking for the smaller, caffeine espresso cup? Available here!