The Bic Cristal, was esigned by the Décolletage Plastique Design Team and is an inexpensive, mass-produced ballpoint pen. It is made from polystyrene (transparent barrel), polypropylene (cap), tungsten carbide (ball) and brass/nickel silver (tip) and comes in four colors: blue, black, red and green. The pen's lid has for the past few decades had a small hole in it to prevent choking if accidentally swallowed.