Don't feel like dragging a whole pencil case with you? BIC©'s iconic four-colour pen conveniently combines the four most commonly used colours into one pen: black, blue, red and green. Writing length: 4 x 2 kilometres. That's as much as 55,172 signatures, 5,768 sudoku puzzles or 8,630 Christmas cards.*

P.S.: Has anyone managed to push down two colours at the same time?

*According to a study by the University of Reading.