Bring energy, pleasure, and happiness to the science geek(s) in your life this Christmas with these Caffeine, Dopamine, and Serotonin silver necklaces. Each of these are made of solid 925 sterling silver and come on various chain length: 14″,16″,18″,20″,22″.
–Serotonin Molecule Necklace
–Dopamine Molecule Necklace
–Caffeine Molecule Necklace