Do you feel chemistry when you think of science? If so, this Tornado Rollerball is made just for you with the Periodic Table of the Elements printed on the barrel in several bright colors. It’s named “Dmitri” in honor of Dmitri Mendeleev, the Russian chemist who is referred to as the “Father of the Periodic Table,” but you probably already knew that. Pick up a Dmitri Rollerball pen and you’ll experience a measurable difference in kinetic energy within your writing.